Best way to use Terrax?

With the announcement of his upcoming Buff I want to learn how to use Terrax. I haven't used him at all (pulled him as a 5 star and left him on bench), and I can't seem to find any good videos on him (except Katy's, which is hilarious.) What's the best rotation to use him with?
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Heavy it does like 10k damage and removes rock shield.
Right best way to use him is to not use him
Have not being not been able to activate his rock field yet since cannot reach 1 bar of power before opponent is KOed.
Seems like for the unawakened version is to use special 3, get a heavy in (to stop power drain), build power and then special 3 and repeat. Is this correct?
To ramp him up, it just looks like sp1 spam until you hit 2 Power Cosmics (max you can gain in 1 fight). These increase his Combat Power Rate, so they're pretty useful for maintaining the Rock Field for longer.
Like everyone else has said, though, Terrax is getting a tune-up in February, so wait until that rolls around to figure his rotation out, if it's even worth it. Also, I don't play Terrax, so it's possible I'm dead wrong.
Looking at his abilities, he does have potential for being an actually decent attacker, but needs to drop his limiters (max 2 Power Cosmic per fight, Rock Field expires faster the longer it's been active) on top of raising values. Also his synergies suck a lemon on his end.