i started my "solo every mission from every contact red/blue/gold" with my Dark Dark Corruptor (currently 34) on Mar 9. now, i work full time and also do other things. so, in almost 4 months i have completed all contacts and every single mission they offer that must be done 1-29. all blue 30-34, and starting red 30-34. anything 30-50, or 30-39 will be done later.
i have done some teaming, almost every tf/sf/trial that is available based on level (missing a tv2) and random badging and fun stuff on teams.
villains defeated 61,438
damage inflicted 8,301,375
damage taken 1,209,497
tasks completed 1,728
tasks failed 4
3,657 reward merits
40 prismatic aethers
9 mostrous aether
1,098 badges
i know there are some missions i have missed, when a 30-34 contact has 1-2 missions to give only to 30-32. F-ing blueside.... but i have tried to get every single mission, not just story arcs. on "endless" contacts i do enough to turn the status to "kindred", then move on. i believe i have done about 99.9% of available missions, but i know i have done 99%+ of them. it may only be 99.7% though...
I have just started red 30-34, have all 35-39, 30-39, 40-44, 25-50. 30-50 etc, and all 50 content to go. there are almost 200 contacts in my sheet to go. 80%+ offer a large number of missions. some depressingly large. not on my list but probable in the future are pvp zone missions, and the SSD, WWD arcs. there are, if you could meticulously track them all, probably 5-10,000 missions in the game.