u don't need to have unbalancing strike to do sneak attack damage all it does is allow you to sneak attack even while u have aggro
i aswell went 1 rogue on my dex/wis/str monk halfling water stance sporting a buffable 53 ac at lvl 11 dc of 23 on the ubalancing and 1d6+9 sneak attack die on almost everything it will cap out at 1d6+19 with enhancments and sneak attack wraps.
guildy of mine is a str based human monk dark using stunning fist and stunning blow he likes it sofar and runs with another guildy same build but light using qstaffs.