Need Build Helping Mapper / Bosser

I really don't feel like farming Simu's anymore.

I need a char (possibly Ranger or Witch) with which quickly come through maps and lay the bosses.

The goal is
To farm Maven Entrance fast
Sirus and Guardians / Elder etc.
Expedition

Map etc does not matter to me.

The only thing on my mind would be COC Ice Spear but is the build even playable after the nerfs from GGG?

Dex Stackking Ballista.