What AI should I use to train on voobly?

Hey guys, im back on aoe after quite some time. This time is even more serious though, with a lot more attention to real strategies and not just because of childhood memories. Even though I know a lot about the game there is still a lot to learn for me especially executing said strategies fast and flawlessly. My problem is, that the standard AoC AI is way too easy even on hard while custom AIs like Barbarian can be beaten on standard but obliterate me on medium.

So which would be a good AI to train against till im ready for multiplayer?