Ok so he has 4 zeta abilities and you need them all along with Relic 7... but until you get him 7 star and Relic 7, whats the order for zera on his abilities?
General consensus from those wise individuals I asked was: Unique for counters, Basic, Lead, other unique. I'm sure others have different opinions, but that's what I'm going with.
To be honest, just hoard the zetas until you use him ... He may be totally useless and garbage and he reaches 7 stars and you may use your zetas for the next Legendary character...
Hoard instead of spending...
Until he is 7* it doesn't matter the order, I'm 15 shards away from 7* but the order I did was, both uniques, basic, then did the lead last since Shaak ti had me covered on clone front until hes ready
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As someone who has him and zeta'd him through time... the above guy is right. It doesn't matter at this point.
A basic rule of thumb I use with these type of characters is lead ability first.
I zeta'd his lead first and his basic attack last. But, it didn't matter.
Hoard instead of spending...
Top left is rank 1 and bottom right rank 10