Co-op VS AI Hard Mode + ARAM When?

I'm not talking about like Halloween Doom Bots Nightmare mode, I'm talking about like a legitimate Hard mode that will always be there, no matter what occasion, where the bots actually play like nearly real players. A good example is the bots in Chinese League servers. I also enjoy ARAM but there is no option for that in Co-op VS AI yet. I think these two ideas will serve as good practice sessions for real PVP. Well? "Entertain me a little more..."