I definitely think more testing of Quick Draw w/ Wise Strap should be done, there isn't really a strap to use with Quick Draw, so any boost is great, even a random one, imo. >.>
While killing Qiqirn last night, I solo'd some without Wise Strap on, and never hit for over 266 DMG. With Wise Strap on, I hit 283+ 1-2 times a mob.
Oh, and I solo'd like 5 of *** before I left. >_> Quick Draw only so...lots of cards used... lol