I think a number of the attacks have a bit longer recharge than you might expect, so some recharge bonus wouldn't hurt at all. It'll help get those heals up sooner, as well.
Some End recovery would help, too, and acc bonuses are always a nice bonus. I ususlly will look for stuff like Crushing Impacts in melee powers and Posi's Blast in ranged aoe's.
Your defenses will lean primarily towards resistance, but you may want to play with a build and see if you could get some decent positional defenses from several of the sets. If so, this will certainly help. If you intend to be more of a range type, then look for sets with range and AoE defenses, and maybe look for Melee def if you intend to use the melee attacks more. Reactive Armor is a good Resist set for adding defs and Serendipity for Def powers. In a melee attack,i f you can 6-slot, Touch of death has some nice defs there.
I haven't done human-only, so maybe some of the others from the "limited forms" crowd will stop by and offer some specifics.
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I'm wanting to make a human kheldian, but I'm not sure of how I want to slot it.
I need some ideas as to what sort of set bonuses would be most beneficial for a soloing human form pb.
If anyone has a Mid's build I could take a look at or something, that would be really helpful.