You all know how long and hard it is to level in TR at times, monsters don't give enough and quests give 100k, and are limited + take time. but this method will make leveling A LOT quicker. In the Crucible, you will find an area the "Robot Factory" which is indicated on the map. there you'll find these bots that can be soloed but the best group for this is a Grenadier, Engineer and a Demolitionist. Theres a
BUG where your ripper stops taking damage after using a shotgun with level 5 into weapons(for knockback) nobody will take damage if far enough from the mob.
You can essentially keep 250% EXP the entire time your leveling. while your training just make sure you all seperate and keep shooting a bot every few seconds to keep it locked in.
Jobs:
Engineer: Keep the groups armor up (especially the demo's)
Demo: Gather monsters, and with a high level Reality Ripper, drop it when group of monsters are big enough throw in your explosive skills + use a shotgun
Grenadier: Gather with the others and flamethrower them when group is formed.
you three may have a bit of trouble at first, but you can find the method easy just seperate, gather and bring them together when ready. (Vent works best, but I find it's not at all needed) the most rewarding part is you will see spams of 4,000+ EXP + 1,900 Credits when you start killing them.
Hope my method helps everyone 