Mobile Strike uses what is commonly referred to as the Nerf to give a severe disadvantage to players that defend with huge amounts of lower tier troops.
Initially in Game of War (which can be considered the predecessor of Mobile Strike) there was no Nerf, which resulted in situations where players defended their base huge amounts of lower tier (tier 1 and 2) troops. This kept the power of their base relatively low, but could withhold solo attacks and rallies from even the strongest players. Strong players and the game makers were not happy with this, so the Nerf was introduced.
The idea of the Nerf is that players with huge amoounts of tier 1 and/or tier 2 and relatively few tier 3 and/or tier 4 troops get a severe penalty in combat. This is implemented as follows:
if the average troop power per troop (so the sum of all power of all troops divided by the sum of all troops) is less than or equal to 10 (Nerf Power Limit) and if you have either more than 15 million tier 1 or more than 5 million tier 2 troops, your troops are nerfed.
Traps are considered in the same way as troops, but traps have less power (even tier 4 traps have only power of 5).
The nerf calculation is applicable to all troops involved in a combat. Since this only applies for armies with huge amounts of troops, this only applies to armies defending a base.
Typically for Trap Accounts you want to have a low power in which case it is preferred to use lower tier troops rather than higher tier, as the lower tier troops give you a better defense related to the power.
Realize that you need to be careful by being close to the nerf limit. The nerf limit is calculated based on the troops and traps in your base. If you are normally close to the limit, having higher tier troops out of your base (e.g. when you are reinforcing allies or joining in a rally) can lower the average power of the remaining troops below the critical limit.
If you only have tier 3 and/or tier 4 troops the Nerf will never apply because these both have power higher than 10 per troop.
If you only have tier 4 and tier 2 troops you can have 13 times as many tier 2 troops as tier 4 troops (only considering Infantry, Tactical, Armored Vehicle, no Artillery)
If you only have tier 3 and tier 2 troops you can have 7 times as many tier 2 troops as tier 3 troops (only considering Infantry, Tactical, Armored Vehicle, no Artillery)
If you only have tier 4 and tier 1 troops you can have 3.25 times as many tier 1 troops as tier 4 troops (only considering Infantry, Tactical, Armored Vehicle, no Artillery)
If you only have tier 3 and tier 1 troops you can have 1.75 times as many tier 1 troops as tier 3 troops (only considering Infantry, Tactical, Armored Vehicle, no Artillery)
In actual situations you will have a mixture of troops in which case it is more difficult to easily calculate it yourself, that is why we introduced a Nerf Calculator that you can use to determine whether your specific troop and trap composition is nerfed or not
The Nerf is something to be aware about when you have very large amounts of lower tier troops. Violating the Nerf limit can lead to huge amounts of troop losses, even from solo hits.
Use our Nerf Calculator to determine whether your troops are affected by the Nerf.