Blobbing in Europa Universalis IV (EU4) refers to the rapid territorial expansion of a nation, often transforming a small or medium-sized state into a global superpower. For many players, blobbing is one of the most enjoyable and challenging aspects of the game. However, achieving it efficiently requires more than just declaring war careful planning, strategic alliances, and most importantly, the right idea groups. Choosing the best ideas for blobbing in EU4 can mean the difference between success and a coalition-induced collapse. In this guide, we explore the most effective idea groups that support aggressive expansion, war, and long-term growth, making your empire-building experience smooth and unstoppable.
Administrative Idea Groups for Blobbing
Administrative Ideas
Administrative Ideas are one of the core picks for players intending to expand quickly, especially early in the game.
- Reduced Core Creation Cost: The main attraction of Administrative Ideas is the massive 25% reduction in core creation cost. This allows you to integrate land quickly and at a lower administrative power cost.
- Extra Mercenary Benefits: Faster mercenary recruitment and lower maintenance costs help sustain long wars without crippling manpower.
Taking Administrative Ideas early ensures that your expansion won’t be bottlenecked by coring time or administrative power. It synergizes extremely well with conquest-heavy strategies and is nearly essential for large-scale blobbing campaigns.
Religious Ideas
Religious Ideas provide excellent tools for aggressive expansion in regions with religious diversity, such as India, Africa, or Eastern Europe.
- Casus Belli Access: The Deus Vult CB allows you to wage wars without needing claims, saving diplomatic points and time.
- Increased Conversion Power: Converting newly conquered provinces stabilizes them quickly and reduces unrest.
- Tolerance and Stability: Improved tolerance of the true faith and stability cost reduction help maintain control over your growing empire.
Religious Ideas are ideal for Catholic, Orthodox, or Coptic nations early on. Combined with a solid military, this idea group helps you conquer and hold heterogeneous lands with ease.
Diplomatic Idea Groups for Aggressive Expansion Control
Influence Ideas
Influence Ideas are crucial for managing aggressive expansion (AE) penalties and vassal integration, two key components of a successful blobber’s toolkit.
- Aggressive Expansion Impact Reduction: A 20% AE reduction helps prevent large coalitions from forming against you.
- Improved Vassal Management: Bonuses to vassal force limit contributions and liberty desire reduction enable you to expand through subject nations efficiently.
- Cheaper Annexation: Reduced diplomatic cost and time to integrate vassals makes this group a favorite for large-scale diplomacy or feeding.
Influence Ideas work best for players who want to balance direct conquest with subject expansion. It’s an excellent choice for nations with many vassals or for those blobbing in densely populated regions like the HRE.
Diplomatic Ideas
Though not often a top choice for war-focused players, Diplomatic Ideas can be helpful for aggressive expansion through flexible peace deals and diplomacy.
- Extra Diplomat: Having more diplomats means more peace deals, claims, and improved relations to manage AE.
- Reputation and War Score Cost Reduction: Increases the effectiveness of your diplomatic actions and allows for more efficient conquest terms.
Diplomatic Ideas shine in the hands of players who enjoy balancing conquest with peaceful expansion and alliance management. While not strictly necessary, they can be valuable in the right hands.
Military Idea Groups to Support Blobbing
Quantity Ideas
Blobbing requires sustained warfare, and Quantity Ideas offer unmatched manpower and forcelimit bonuses that help you fight longer and more often.
- Extra Manpower: More troops mean longer wars and the ability to fight on multiple fronts.
- Cheaper Regiments: Reduced unit cost makes fielding larger armies more affordable.
- Synergy with Policies: When paired with Economic or Religious Ideas, Quantity unlocks policies that further reduce war exhaustion or increase force limit.
For any nation planning to blob through war, Quantity Ideas are one of the most consistent and effective picks. They’re especially strong for nations like Russia, Ottomans, or Ming where army size dominates warfare.
Offensive Ideas
Offensive Ideas focus on improving your army’s quality and enhancing your generals, making your forces deadlier and faster in war.
- Siege Ability: Faster sieges mean quicker wars and more efficient expansion.
- Leader Fire and Shock: Boosts to general pips help win key battles even with smaller armies.
- Discipline: A late bonus that makes your army significantly stronger in battle.
Offensive Ideas are excellent for nations that already have large armies and want to maximize military performance. Ideal for France, Prussia, or any player aiming for military dominance.
Economic Support Ideas
Economic Ideas
While not directly related to conquest, Economic Ideas play a supporting role in sustaining expansion through stability and income management.
- Reduced Inflation: Helps manage the economic consequences of looting and high war spending.
- Lower Maintenance Costs: Reduces army and advisor upkeep, freeing more funds for war or development.
- Development Cost Reduction: Useful for enhancing your core territory to support your growing empire.
Economic Ideas pair well with Quantity for a powerful policy combo, making them a favorite among experienced players who prefer sustainable, long-term blobbing strategies.
Best Combinations and Timing
The order in which you pick idea groups is nearly as important as the groups themselves. Here are some recommended combinations and when to take them:
- Admin → Influence → Offensive: Perfect for early coring, mid-game diplomacy, and late-game domination.
- Religious → Quantity → Economic: Best for faith-based conquest with economic depth.
- Administrative → Diplomatic → Quantity: Balanced build for maintaining stability while expanding rapidly.
Generally, starting with Administrative or Religious sets the tone for conquest. Influence or Quantity as second picks help you handle the consequences of rapid growth. Later groups like Offensive or Economic offer efficiency and sustainability for world conquest goals.
the Best Ideas for Blobbing
Blobbing in EU4 is about more than brute force. It’s about smart planning, efficient expansion, and staying one step ahead of your rivals. Choosing the right idea groups like Administrative, Influence, and Quantity gives you the tools needed to core land, manage AE, and field large armies. Complementary picks like Religious, Economic, or Offensive round out your strategy depending on your situation and chosen nation.
Whether you’re playing as the Ottomans carving through Europe and Asia, or a minor like Brandenburg growing into Prussia, the best ideas for blobbing will give you a significant advantage. By planning your ideas carefully and adapting them to your goals, you’ll be able to turn any nation into a global powerhouse. Happy blobbing!