Melee generally means "in combat." Heh, except when it doesn't. But ya it should work fine.
The 3d4 light damage is 7.5 damage, scaling with 200 spell power is 21 damage/hit. It's not really meaningful. 10 Fighter would be better.
Fighter would also give more feats, which you could use for ranged feats, so you could take evo/spell pen feats with normal feats.
Then grab a
Snowstar.
Eventually swap to Kensai T5, NiS T4, with ki regen from kensai + water stance instead of HeM.
Then you would have everything line up for you. Crit range + multiplier + ranged power + helpless + helpless damage +kensai raw damage + NiS sneak damage + fort bypass
Defenses would line up as well with Stalwart Defensive stance + Shintao Iron Skin + AoE stun
Healing would be weak, but as ranged with chain AoE stun wouldn't need much.
I'll let you figure that build out!