Okay Cerveza.

Here's what I've come up with for this suit.
First off, I've left 5 imbuing slots open on the suit itself to allow for resists to be added to round the numbers out. I always start by spreading the base resists evenly across the categories so it's easier to balance things as you craft the base items with whatever leather you want/need.
Without imbuing any resists to this point, or adding in the bonus for leather type, it sits like this:
66/56/56/56/71
4/6 Casting
40 LMC
14 MR
40 MI
35 HPI
45 DCI
45 HCI
8 SI - Might use any left over imbuing slots here?
8 Strength
5 Dex
More than likely, horned leather is going to be the best choice across the board. The 44 resists that horned will ad, should free up 2, if not 3 more slots for any other goodies you'd like to add or buff.
I can give you the breakdown if you'd like to see it.
Good times!
Edit: Sorry, something struck me after I posted. Make that 6 Imbuing slots left open.