Swgoh farming flowchart

The first focus is going to be getting Jedi Knight Revan unlocked, and having the squad also prepared for the Darth Malak event. JKR is a great character to unlock as early as possible, and will help climb the arena ranks a lot faster once obtained. Note that most of these characters don't need to go beyond Gear 9-10 to finish Jedi Knight Revan, but for the Darth Malak event, they'll need to be at a minimum of 16,500 power. Getting to Gear 12 is the most reliable way to do so.

Bastila Shan - Gear 12
Jolee Bindo - Gear 12
Zaalbar - Gear 12
Mission Vao - Gear 12
T3-M4 - Gear 8