Dice - AOK

The best way to use him is probably making him a Swordmaster and giving him Speedwing + RP to ORKO Dragons in midgame. The huge exp gain from Dragons allows him to grow a pretty decent Spd stat and keep his Str bearable despite only having 30% in it as an SM. He should probably switch to Berserker as soon as it lets him double to patch up his Str and train axe rank for the lategame (maybe with an Arms Scroll, he'll be 15 round short of A as a Berserker then). I think it's enough for AOK.

Malice - Iffy

Same base Spd as Dice (needing Speedwing + RP for the golden 22 Spd), but a lot less Str, having 13 as an RP!Swordmaster compared to Dice's 16.