My take on samurai, is a melee dps with 4-5 combo skills, that can be used in any 3 combo order, but have different effects at end depending on certain orders, one could boost your defense, another boosts your offense, one applies a dot, etc.

With a few unique skills thrown in, such as a jump attack that basically has you dash through the enemy. A super powerful attack that can only be done while weapon is sheathed. Maybe ability to wear different banners that apply weak party wide buffs?