They any good? Does anyone know how high their damage can get? I'm thinking about swapping my smiter to charger

a charger is optimal for HC noting their damage enables 1 hit KO's.

If you want high survivability you could use:
Grief BA + Phoenix ST 45@
Forti (enigma if you need to be able to tele to town)
Gores
Wisp
Raven
20ias/10cb/str/dex/res gloves
Highlord
Dungo
Diadem: 2pala/visio/2soc/adds BERBER (or 10ds/visio/2soc armet)

Diadem should be chamBER if enigma and ideally have fcr.
Raven should be 10fcr/ads if enigma