Maybe I'm just not putting in enough effort but I don't think tarkatan is worth trying to make it work.
Here is how I view the character:
Pros: Alien as a base character has great footsies and good mixups, jump 2, basically just base Alien is good
Cons: low damage, extremely unsafe, lost a lot of combo capability because of no delay rekka
I only played him because he was broke and now this goes beyond that. I don't see any reason to pick him over acidic.