depends on how you want to play of course. pure hv dukes are good because maxed sumo suit helps in any situation (especially pvp). since you want pure ap, gambler would be a better choice because aoe dmg for full house is better. http://forum.ntreev.net/trickster/forums/post/112239.aspx
or look through here for more stoof http://forum.ntreev.net/trickster/forums/thread/71512.aspx
(Characters) - Fantasia
[Main] Hirosune Lv. 223 Duke/Raccoon (pure HV)
[Secondary] Hirotsumi Lv. 153 Champ/Bunny (pure ap)