Increasing AI difficulty

[Warshed]

I was just wondering. I have been playing SE IV for years now and it seems the AI just never makes any successful incursions into my empire. I have the difficulty at maximum and their benefits at maximum. I even tweak the AI empires to make them awesome, but they still never attack. Even when they could easily wipe me out with their 50+ ship fleets, they never do any incursions. Does anyone know any good mods out there or ways of increasing AI difficulty? They also always make trade agreements with me, and before long all of them love me, so I can just pick them off one at a time in wars.