You can definitely go caster, generally more expensive for the powerscrolls and you have to worry about mana but that would work too.
Mystic Mage
120 Fishing
120 Mysticism
120 Focus
110 Magery (can go to 120 if you have the gold)
110 Eval (can go to 120 if you have the gold)
110 Med (can go to 120 if you have the gold)
Get orc slayer tali or spellbook, disable ship, cast on pirates, board ship, RC tank and cast on Boss, save enough mana for when RC is ready to poof or you may have to kite while your mana regens.
Spellweaving Mystic Mage
120 Fishing
120 Mysticism
120 Focus
120 Spellweaving
110 Magery (can go to 120 if you have the gold)
110 Med (can go to 120 if you have the gold)
Get orc slayer tali or spellbook, disable ship, cast on pirates, board ship, RC tank and cast on Boss, save enough mana for when RC is ready to poof or you may have to kite while your mana regens.