A webwork of strong friendships built on trust can save you when nothing else can. Take them for all you can get. Thieves do steal, yes, but this is who they are. Real thieves, although they break the laws, can be easy to talk to and quite trustworthy indeed. One just doesn't want to get on their bad side, though, for they'll rip enemies' hearts out without thinking twice about it.
Thieves are fast, but let warriors or adventurers take the majority of the monster's hits.
Then sneak in and stab the monster quickly. Thieves usually also have a basic knowledge of magic and can do some damage from long range, too. General wizard tips. Magic skills should take priority over every other skill. A low-level wizard with a high Earth Magic skill is quite dangerous indeed, inflicting up to around 40 damage per hit against animals vulnerable to magic.