I haven't seen many rogue/fighter WF builds, so wondering if it's a good idea. I'm thinking stats as a fighter, go maybe 12 dex (starting with adm body and swapping it out later), but starting out with 2 levels of rogue for UMD, evasion, and sneak attack. Can I still get a good THF kensai build with only 18 levels? I'm fairly new to the game, so what would I be missing out on with those last 2 levels in exchange for the rogue levels?