Xalek uses same stat as your SI, so give him your hand-me-downs. You'd be better off with Ashara if you want a melee DPS. Xalek is really a tank, so he's non-optimal as DPS.
Of course, that starts as an empty shell.
The only places I can think of where you can get full comp armor sets at one time are:ġ) Completing weekly on Yavin-4 (full 192 set except MH/OH)Ģ) CM / GTN - i.e.