i will add my old solo team into the mix for the forlorn dungeon, with this team i can do 4 gates without need for cursed fountain or ethers (although for 4 gates u need fountain healing for 2-3 revives). 3 gates is the sweetspot with this team if u don't get unlucky crits or encounter skippable enemies u need at most 2-3 healings from fountain. Just to clarify this is for normal mode not heroic.
Mimikyu
Volcarona
Blaziken
Weavile
Chansey