Omicrons (number and timing)
No GC participation under the old system: 0 rewards
No GC participation under the new system with dailies completed: 3 omicrons, lots of other stuff, and 26k credits. Spending 19.2k of those credits on Omicrons brings you up to 11 total.
To get the 12 omicron, you would need 26.2k more points to get to box 43. Low performance on the free feats (1x t8, 7x t7) along with the free Marquee feats (8x t2) gets you there. This requires no points from the faction feat, can be done with your 3-star Marquee, and doesn’t require the pass.
Under the old system, your 2 omicron rewards would be on days 4, 7, 11, 14, 18, 21, 25, 28. After this initial period (why I suggested 10k credits from the anniversary gift), you can purchase 3 omicrons on days 1, 8, 15, 22. While you might be behind on your 4th omicron in week 1, you’ll be ahead of schedule by week 4.
(1 quick edit for clarification)