Formation Help with AA+ physco winged Brutes

I'm currently running phsyco winged brutes AA+ consisting of the following:
35 bp DED
32 bp DEA
22 bp PAP
30 bp Health up
35 bp IPD

I have two pyscho EX monsters and an AA Soltan.

Should I work on the two ex monsters and sell the AA soltan?

What is the most logical step to improve my current formation (still want winged brutes)?

If I go ex, what skill should I pick (I'm thinking IPA and dumping the 22 bp PAP)

Thanks,

Ok, now I have 4 x EX.  Thoughts, anyone?

My cynical thoughts: get a 5th Ex, level them all, and just go for a full Ex form. Even though grand brutes will keep your brute combo, you'd be losing out on rarity, level, and grand species combos if you try mixing Ex with AA+. That's a loss of approximately 20% atk, 15% def, and 5% hp, which I'm sure isn't very appealing. Plus another 5% atk and def, since grand brute combo gives 5% more than regular brute combo.

One question:

If AA+ and EX skills stack, it seems like it's worth losing the attack and defense if you can run two ipd and two health up.

While the skills do stack, I would still advise against it. It would only be effective against AA+ teams, against Ex/AAA+ teams it's just shooting yourself in the foot, as the stat losses to attack or defense would be too great, even if you account for one of them. If it was just a species combo becoming 4-1 or 3-2, I wouldn't be so concerned about it, but it's rarity that you're losing. Partial rarity adds 0 to attack, defense, and health; at least partial species still adds 5%. So I still wouldn't mix Ex with AA+.

If you want to stack skills, skill change the EXs. Doubling up on a skill with an AA+ in no way comes close to compensating for all the combos you'd be losing.