Thanks :)
I thought I'd give a Juggler a go, as I swap weapons from prepared and backpack frequently, not just because RL, DS and BFG don't give many rounds. I wanted to see if any skills provided a noticeable difference, but I didn't really notice a difference from Juggler, wishing I had an internal calculator to tell me the exact time difference. Don't know if it only affects prepared weapon or also backpack weapons.
Int(3) I think was after the Chained Court and before or just at the hellish cities. I made some tactical errors in CC, that hopefully I won't repeat. I was at Int(1) during or before Arena (I love pulling levers).
I only find Arena troublesome during AoMr and AoB, and AoMr isnt that bad, just time-consuming, I've survived Arena spawning in between 3 Cacodemons before. In other UV modes I have a Chaingun by then and Arena is a piece of cake :)
Adv DS was before Mortuary, maybe level 17 and I found another one before or after the Mortuary. I have no idea whether Adv CS is better, so kept the DS at the Mortuary. I can't remember if I found an Adv CG before Mortuary or not. The other weapons in the usual places.
I used DS during City of Skulls, don't think it was Advanced. The rest of time I was using DS/Adv DS mainly because I had shells and very few rockets and cells. I wouldn't recommend it as a fast way to kill grouped enemies at long range, unless they are lost souls. Most of the time it was Arach, BoH and Cacodemons which take forever to die.
I probably blew up a lot of ammo I couldn't see, so if I get Int[3] again I will try to play more tactical. I wish I found more Computer Maps.