You won't need /nin. Just watch the links. You could probably sub smn for all it matters for the extra tick of mp... Main thing is keeping it dotted while you rest (if you need to) and watching out for the links. The spells they cast hurt.
Keep barstone and buffs up at all times, DoT it to death, nuke freely at max range. It can't touch you. (the links have further casting range and will nuke you hard.)
Good luck!