Zader AAT advice

So, my next Zeta is up. I was thinking of getting Zader so my Sith team can be useful in HAAT. At the moment I lack a good team for P3. My First Order and Droids demolish P2, and my Rebels and Clones destroy P4, but my P3 teams are not good. Currenly, I run Zaul in arena with Sid, Vader, EP, and DN(almost 7*). With the new bug fix for Zader, would he still be viable for a good P3 team, and would the toons I mentioned above be viable with just a switched out lead with Zader, or would I need to throw in Teebo for adequate TM reduction, or another buffer to get past the cannon? Any advice here would be helpful so I don't end up wasting my zeta.