Freshly passed at 170k, some RNG but safe enough to recommend it:

x - 6p

Earth Main - Pain Tendo - shiba

x - WB asuma

Asuma skill breaks, 2s are good, but do courage Y+1.

Earth main skills: 4 3 4 2 4 (you aren't keeping1 so it's pointless)

summon: Gamaken. Shiba Mystery.

The more damage Tendo does round 1 the better and he kills gaara's barrier, shiba will soak up the r1 combos. Every other round should be about 6p blasts hitting and take you to victory. even better if you get a second shot from Tendo which I didn't.