Here's what I did, from start to the end.
Human female artisan, starting in bestine.
Master Creature handler
Pistoleer up to 2444
Dropped Creature handler,pistoleer
Got my first three holos from dark troopers in the naboo faction dungeon, 2 red 1 blue
First holo told me to master ranger. Dropped all medic+doctor, got master scout, master ranger.
Second holo told me master doctor. Dropped all scout, got master doctor.
Third holo told me master weaponsmith. Did that.
Fourth holo was silent.
After the fourth holo I mastered artisan and brawler.
Finished the rebel themepark, did some other rebel-related quests. Did the jedi-quests on dantoine ( or dathomir, not sure, from the jedi in the cave with the dark jedi outside ?) Not much else in quests though.
Got the two monthly badges on the rebel side, no others.
Placed a house and declared residence, yesterday.
Was rebel colonel, the highest rank, for a long time.
The slot opening message came at the first mob i killed today on dathomir, a female picket longhorn.
For evidence, look at all the other posts with screenshots from me. I'm the wrong person to keep this silent, I just love attention :-)
Monika T'Sarn, Combine