-Automate deadline is just a 20% chance to activate. You have to be hit near death 5 times for it to even activate once. XD
-Aerial advance level 1 only translates to a 2% increase in damage... negligible.
-Shifta Advance, even with a level 14 shifta = 1.25x damage. Not entirely negligible, but shifta without shifta advance would give about 1.2x damage. That 5% difference will not be very noticeable...
-Shifta Critical: from what I heard, it is not a +%. But rather, if you had a 20% critical chance, it would be 20*1.15 = 23% chance to critical. You're going to need a LOT of ability to make good use of shift critical unfortunately. Your gunner build doesn't do that however, so I think the points in shifta critical will be wasted.
Since the only things I found useful about a techer subclass is shifta, resta, and pp restorate, I thought you can pretty much put whatever you want for the rest of the sp... But, if you ever decide to main as a techer and have some other subclass, you really don't want to have a gimpy one or have to buy another skill tree. @_@ So I built my Te as I would a FO-type just in case.
-I also stacked ability because of my mag build lacking ABI. I think stacking range would be optimal though...