The areas in Act 5 are:

Main Town - Harrogath. This has Malah, healing. Larzuk, weapons. Nihlathal, gambling. Qual-Kehk, the soldier leader.

Bloody Foothills is the first area out of town, with lots of catapults and tiered areas. There are no sub-areas. This has enslaved and death maulers. Plus the catapults. Shenk the Overseer is the main monster at the end.

The Frigid Highland is next, with the waypoint right inside the entrance to it. This has the various prison areas that you rescue the warriors from. There are really annoying mages that appear and disappear - use an area-affect weapon if you have one to just blast the general area they are in.

Diablo 2 Walkthrough
Walkthrough Master Index