Rampage Tiers

Which place is best to get all Rampage Tiers? I got to Ninth Tier in Dried Lake, but seems like not enough monsters there.

i tried Riverways normal 2 times, was at 378 (tier 10), but walked a bit wrong at the rivers down with lightning warp.
with the remaining monsters, it should be possible to reach the 520,

had 27% movement with a low haste and used flametotem.
think this is a good map for the tiers, also cause the spawning apes.
ill try it again tomorrow
http://pathofexile.gamepedia.com/Rampage

I got mine in shore dried lake would also works. All you need is to roll pack size and sea witches or roll pack size on a map that inherently has sea witches.Obviously you also need decent dps.

Dried Lake and Shore are very nice and you do not need Sea Witches for it but at least about 40% packsize.
Did a Dried Lake with 34% packsize and the total number of mobs was just not enough for what you need for T13 Rampage (832). I made it to 803 killchain (solo) this way with just about 20 mobs missed that were hiding behind rocks so if i had gotten all, it would have been barely not enough (~825).

Since then i managed to get the challenge done together with a friend quite easily (860-870 killchain if i remember right) but with some theorycrafting involved and i won't spoil it completely for now. Just a hint: you need 2 people in a group, good coordination and good clear-/movement-speed ;)

Got mine on underground sea. It's a nice straight and long map, didn't roll anything fancy on it...

actually I think it had +monster life, and 2 exiles, freaking Magnus showed up for a couple seconds at the start. Glad I killed him before he killed me with his 1 shot BS mechanics.