Strike Force, AE and what else?
Time to make a new MM!
What's left is to normalize all Assassin Strikes and improve Stalker's old sets (Claw, MA and EM)! You don't need to bring back the missing PbAoE attack. You just need to make the existing ones better! For example, make Slice a WIDER and LONGER cone.
Run missions for purple recipe drops.
total kick to the gut
This is like having Ra's Al Ghul show up at your birthday party.
Come out and do some ITFs/LGTFs and enjoy coop teams 
What server are you on?
Get all your accolades and IOs
Go bubble lowbies in Mercy. They'll love you for it.
SFs, accolades, badges, IOing up, working on your secondary build, base building, unlocking energy rifle costume parts (2, i think, maybe 3), redoing content you may have missed via Ouroboros, etc.
53 Bots/FF/Mace Mastermind | 53 NRG/FF/Electricity Defender | 50 Time/Dual Pistols/Soul Defender | 50 Demons/FF/Mace Mastermind | 51 Necro/Dark/Soul Mastermind | 50 Thugs/Time/Mace Mastermind | 50 Ice/Ice/Arctic Tanker | 50 Plant/Rad/Earth Controller | 50 Illusion/Trick Arrow Controller | 50 Gravity/Force Field Controller
Yes, I like Force Fields.
Tweak your builds, work on SF's, pick up any accolades you don't already have, go badge-hunting, or go to Ouroborous and work your way through every story arc in the game.
Well after being involved in Beta and playing on and off (mostly off) since the game came out, I finally have my first 50! It's a Bot/FF MM I rolled in 2004. I had fun getting him there, mostly solo. Now, what is a 50 MM to do? I don't want to just sit him to collect pixel dust. Any ideas?
Thanks!
Primaries: Doctor Roboto - 50(+3) MM (BOT/FF/MU)
Johnny Liberty - 50(+3) Tank (EM/INV/EM)
Lvl 50 Archetypes: MM, TNK, BRT, SCR, PB, CNT, DOM
Still working on: NONE! NCSoft won't let me. =(