The turn and spin is the preferred method for me because it’s familiar from my hang on days, though I’ve gone over the bridge on several deer as well. When I stand and turn I usually go under the armpit but over the shoulder is probably “safer” because it feels like a harness. Couple of factors to consider such as platform depth, which direction the deer is coming from, as to whether to spin or go over the tether. The 4 deer I’ve shot out of the saddle this year have been at 2 o’clock, 6 o’clock, 9 o’clock, and 6 o’clock again.
Totally get the attraction to using a .5 as a hybrid, something I’ve considered myself. Just don’t love the side pressure kickout issues when moving around the tree strong side. But it completely eliminates any weak side issues.