Yeah slave one and vaders ship take a long time to 7 star but they are good so it's worth it. It looks like you have vader and fett fairly high so once you unlock vader's ship they'll be pretty strong even at low stars. If you get them to lvl 85 they should be enough to use in events and do well. Then I woukd level the other ships you plan on using on the event one by one. You'll probably end up beating it before eveything is 85 but the good news is tarkin cap ship with vader fett and tfp are arena viable. I use thrawn now but still use vader, biggs, and tfp as starting line up. I use fett and fives as reinforcements. I have ghost as my last but rarely need it. If you use tl right that team can be deadly under tarkin too.
