trupheus It actually should not make it harder because
If Lear loses 20% or more of his army, he wouldn't be able to rebuild that much in time. Let's say he loses 50%, in 6-8 hours he realistically should only be able to rebuild about 25% unless he has a stockpile. Which if he does, then it will take another break to get him. He shouldn't be punished for being first.
Second thing is, if someone hits him and only kills 15%, then he has a new total army and is still open to attacks. Another 15% and he's still open but has lost just under 30% of his army and is about to lose more to an oncoming attack.
The goal is to find a balance where he can rebuild more than he lost if he loses the minimum 20% and gets protection. But can't rebuild it all if he loses like 70%