i think a new acquired skill should be implemented called overkill. when we ambush an attacker 5-10 seconds before he hits us and he loses the overkill skill should kick in and we eliminate all his siege engines and double more of his army than normal. all the big attackers are premium players and buy back their complete army with real money anyways and they are all noobs
with overkill we the experienced non diamond players get more war income and you imperia make more cash from those diamond noobs
its a win win situation, think about it