Borderlands – Fast HP Regeneration

Kill flesh stick again and again in the Tina special guest quest. best if your coop partner stays by her and keeps beginning the mission while you are where he spawns waiting for him with a shotgun or else. at lvl 14 its 1800exp every time. i leveled to 20 in 5 minutes.

Note: If you restart the quest too quickly fleshstick will stop spawning and you will have to reload the area. To avoid this, wait until Tiny Tina finishes her line ending with "my abode". If you mess up, first she won't speak her next line. If this happens, wait a minute or two (to let Tina finish the sentence, even though you can't hear it) and start the mission once more, Tina should talk again.

I was hoping for a more authoritative answer, but after >50 hours of gameplay using mostly elemental weapons, I'm pretty darn sure there's no longer a tech pool.

Elemental guns deal consistent damage and elemental effects are randomly distributed. The visual effects are consistent (either a shot was elemental or not, you can tell by watching the bullet impacts).

This means that slow firing weapons are worse for stacking elemental status effect damage than high rate of fire weapons, which is sort of the opposite of how the old Tech Pool worked. The status effect chance % as listed appears to be the only relevant factor for "procing" a shot, though it's affected by skills, class mods and Badass bonus stats.