I've made a 15th level warlock vigilante with the idea of being a magic thief, though I'm not sure what situations would be good to playtest it with since I don't have a giant amount of experience at high level, any suggestions on what encounters might be good for it?
In general I go with dragons for playtests since they can do a lot of cool things. For a vigilantiy though maybeake some super villans? (High level NPCs)
I'll add a dragon to the list. It'll probably have a lot of air superiority, so hitting it might be difficult with my characters low-range.
Encounters with a large number of threats
Encounters vs things with a variety of targeted saves (reflex, will, fort)
Encounters targeting a variety of defenses (CMD, AC, saves, defense bypassing)
Encounters where you get the surprise round
Encounters where they get the surprise round
Encounters with no surprise round
Encounters with things huge and up
Encounters with flying opponents
Combine as many as possible.