Hello and Welcome,
I am doing some Season 3 and only Toment 6 Services:
Level Service:
Level 1-70 --> 100fg (If you got exp gem on Level 25 only 60fg)
Or 5fg/each Level
1-70 takes just 20-40mins
Caches:
Doing only Act1 and Act3 caches and each cache cost 80fg
Rifts:
Rift to Rift Guardian --> 40fg
Full Rift --> 120fg
Grifts:
Level 25-30 --> 50fg/each