Marauder > Dark Knight, Thaumaturge/Lancer (Swiftcast, Surecast, Fire, Blizzard, Life Surge, Invigorate, Blood for Blood).

JA1: Stance, makes magic damage proportional to enmity level while decreasing enmity from spells (build enmity with Marauders combo to make magic damage worthwhile).
JA2: Drain, deals damage and restores HP proportional to damage dealt.
JA3: Soul Eater, sacrifice HP to increase other stats.
JA4: Last Resort, ability which deals large damage and greatly increase damage and decreases defense, while generating a large amount of enmity.
JA5: Soul Flare, deals damage proportional to current HP (lower HP, higher damage).