I had this crazy idea lol, how viable would a 12 rog acrobat/6 arti engineer/2 mnk be

12 rog acro for the obvious reasons, arti engineer for the weapon boost, the infusions on the weapon also monk 2 for wind stance and maybe a slight boost to ac from wis.

Is this crazy and am I missing some huge gimp on this? I know some qstaff build are looked down upon but this in my head seems worth a try...

Any thoughts?