How to Get Higher Effective Military Strength (EMS) in Mass Effect 3
If you want to win the war against the Reapers, it's going to take more than a stack of thermal clips and a well-placed biotic charge. If you want to win, and get the best possible ending in Mass Effect 3, you're going to need to have the whole galaxy ready to fight. Here's a guide to exactly what you'll have to do if you want to get the best possible ending.
Effective Military Strength?
Your Effective Military Strength, or EMS, represents the military, scientific and tactical strength that you can bring to the final assault against the Reapers. Your EMS is determined by multiplying your War Assets by your Galactic Readiness. For example, if you have 4000 in War Assets and a Galactic Readiness of 50%, your EMS will be 2000.
Almost every quest and mission in Mass Effect 3 will reward you with War Assets. To get your EMS as high as possible, you'll want to complete every quest offered, and talk to as many people as possible. Taking to people, especially people on the Citadel, can unlock new quests. For example, speaking to Aria T'Loak in Purgatory, which can be found on the Citadel, will unlock quests that allow you to gain the collective firepower of the three main mercenary groups in the Mass Effect universe: the Blood Pack, the Blue Suns, and Eclipse.
Making The Right Decisions
The dialogue choices that you make in Mass Effect 3 will have a serious effect on your EMS. Often, you will have to make trade-offs. In some cases making the wrong choice will leave you without vital resources. As a general rule, if there's a possibility of getting someone on your side, try diplomacy before you start shooting. A living ally is a lot better than a dead enemy.
Scanning For Resources
Scanning local systems is an easily-overlooked way of getting vital war assets. You can find everything from fleets to scientists to valuable artifacts that can be turned in for quests. Each system will list the percentage of resources that you have recovered. If you really want to rack up your numbers, scan every system until you've hit 100%. Just watch out for the Reapers.
ME3's new co-op multiplayer mode is the only way to increase your Galactic Readiness. The Galactic Readiness score essentially works as a multiplier. So if you were to raise your Galactic Readiness from the default 50% to 100%, you'll double your Effective Military Strength. Even if you're not big on multiplayer mode, even a small increase in your overall Galactic Readiness can make a big difference in your final EMS score. Win as many games as possible in as many systems to crank up your Galactic Readiness.