Planar armor is not made for the purpose of giving you all wis IMO, i think it is designed to balance you out, give you a lil of everything. though i do wish my druid gear from the planes all had wis, it dont, and im willing to accept this, because i can still one day use those resists on a dragon raid, or whatever i may need them, but until then, ill just toss em in a bank and let em chill, every item has its uses and place, you just gotta find it :)
But on a side not, i must mention this, ...No ac? it should at least have that :P