Best custom AIs

Hello everyone, Since nowadays I rarely manage to play ranked because of little time available and the inability to play being sure that I won't be interrupted. The few times I manage to play ranked I get spanked really hard and I feel my reactivity is way too low (I peaked at 1350 months ago when I played more often). Playing against AI doesn't help practicing and isn't fun anyway, I don't remember when was the last time I lost against extreme AI, is there any mod for a really challenging AI? Barbarian seem to not work anymore