I don't allow them to buy promotions. I use a time in service/grade scale. They have to stay in their grade for a certain length of time before they can be promoted; then unless they have done something naughty. I don't normally make them pay for the promotion, but have them do (or if their CO wants them promoted, his) an administration roll to get the paperwork through. (You could still have them spend the points if they succeed.) The commander could order a waiver of the time in grade, which halves the TIG.
ENS to LTJ: TIG 1yr/6mo. waived Admin TN 5 (nearly automatic)
LTJ to LT: TIG 2 years/1 yr waived Admin TN 10
LT to LCDR: TIG 6 years/3yr waived Admin TN 15
LCDR to CDR: 6 years/3 yr waived Admin TN 20
CDR to CPT: 6 yr/3yr waived Admin TN25 (might also want a renown limit at this point; promotion to captain & above is usually based on who you know/who knows you)
CPT to RADM: 2 years/no waiver Admin TN 30 (definitely want a renown limit -- this is an elite club, after all!)
RADM to VADM: 1 yr/no waiver Admin TN30
VADM to ADM: 1 yr/no waiver Have to play politics for it, so if you're not on an assignment at SFC or on Earth, you probably won't get it. Use Persuade instead of Admin; you have to schmooze. Rollplay it out...
ADM to FADM: only if there isn't one. Have to play politics for it, so if you're not on an assignment at SFC or on Earth, you probably won't get it. Use Persuade instead of Admin; you have to schmooze. Role play it out...
"War is an ugly thing but not the ugliest of things; the decayed and degraded state of moral and patriotic feelings which thinks that nothing is worth war is much worse. A man who has nothing for which he is willing to fight, nothing which is more important than his own personal safety, is a miserable creature and has no chance of being free unless made and kept so by the exertions of better men than himself."
John Stuart Mill