Boba Fett Leader Team

I've been running this arena team:

Boba Fett 7* Lead
Greedo 7*
Chewbacca 7*
IG88 7*
Lando 7*

I'm looking to make it more of an efficient team. I'm feeling like Chewbacca might be a weakpoint, but i'm only keeping him around because he's 7*, has a taunt and protects Lando/others at least for a turn.

Any suggestions? Should I look into a full BH team with the new BF leader ability?
Or should I just look to upgrade tanks (and if I do, how many stars before its viable to switch in for Chewbacca)?

I just finished IG88 in arena store, so i'm looking to start someone new there, but i'm not sure if I should begin the long trek to 7* STHan (but not sure who to farm from arena otherwise I guess).

Here are some of my other characters of note in purple gear:
IG-86 7*
HK47 5*
Dengar 5.5*
Zam 5.5*
Cad 5.5*

Also have a secondary clone team going
Fives 6*
Cody 5*
Sarge 5*
Echo 5*
Rex 4*

I also have low level characters that I am considering sharding up due to having shards in their ships, but only want to bother if there's a synergy in arena/raids with the above:
Sun Fac
Geo Soldier
Geo Spy
TFP
FOTP
Poe

Any suggestions would be most appreciated!