Well monk sub will give you more hp and you can use a few extra abilities. Its not bad but lets just say its better than the other way around for some XD.

For THF/MNK you will be using Sneak Attack for more damage, add it with Focus to increase accuracy, and Dodge to increase ur already insane evasion. Then use Boost so your first attk will do alot of damage, then strike him hard. Done right and you can be a powerhouse for the most part. Also you will be renkeing with other meleers(or me...i like to whack stuff and i occasionally whack stuff with my staff). Its a pretty solid combo IMO, any other beta testers i would value your opinion too.