Minor suggestions:
- you probably will need 5* scoundrels for lvl 70 or lvl80 heist (need verification, anyone?)
- guild shop - notable farms: Rex(leader skills, TM manipulation on raids), Ewok Elder (great healer for raids and GW), Maul (only fleet usage), Rey (only speed mod challenge)
- gw shop - Teebo (if you plan on getting high rancor raid spots), phasma (good support unit for raids and gw)
- on crystal usage: mod packs are not so bad, but only if you unlocked 5* ones, buying mk5 furnaces from shipments is a good option (1,4k crystals) or mk5 furnace salvages from guild/fleet/shard shop
- hard node farm (if you have spare energy): Anakin