LordBiBo |
Well, most of the things that make a rogue a rogue is their skills and luckily wizards get tons of them. So rather than putting them in your wizard skills, just throw them into rogue skills. Put a feat into light armor so you can wear the leathers and you are golden. You wont be as good as an actual rogue at it, but good enough to fake it. Just don't cast anything when anyone is looking and you'll be fine.
Deadmanwalking |
Well, Rogue 1/Wizard 3/Arcane Trickster X (doable with Accomplished Sneak Attacker) does a pretty good job of this.
It does, as mentioned, run into the issue of needing to conceal spell-casting, but there may well be options for that in Ultimate Intrigue, and even now there's Cunning Caster. Due to how that works, you might want to go with a Psychic Caster to make it work.
But that, sadly, wouldn't sych up with Arcane Trickster.
So your precise priorities in this matter.
Investigator also definitely deserves a mention, though it doesn't meet the standard definition of full caster. I mean, it's a caster who does Rogue stuff only better.