cant find a good ping server and have to pvp? heres what you do:
shoot a blast/unleash a move BEFORE you would want to do it. (lets say u have 300 ping) you shoot your blast 0.3 seconds before you want to shoot, and use that ping time to correct your blast. sorry if its confusing. but thats my trick to partly counter ping
note: this works for not just AO, but other games (almost every online video game with ping)