Any high density tz like tomb or cow
tz cows is super nice, this is prob my fav so far
I've said it before the fastest route is to just set up the bportal at exit of kurast and then teleport the entirety of river and clear everything in spider/marsh/flayer/lower/bazaar/upper/trav, because once you have the billion+ aoe you don't need to spam any more portals, just teleport and trigger the enemy update to instakill them (dream merc recommended so you don't have to stop to leap or whatever). That's the densest area of the game and because its all connected you don't have to repeat cast portals. Granted its a lengthy setup and if you go TOO big you'll crash the game
hm this isn't how it works
TZ is the way to go. You want lvl85+ monsters for all the GG uniques and runes
Cows for bases and runes
Either way fast and easy clearing with portal barb
bases and rune drops are nice for tz cows, but it gets a little boring so I'm trying to mix it up with new areas