this may or may be deleted, but wasnt it confirmed by a mod a while ago that the already low chances of getting skills in trials drops for each one you already have?

so if you have say 2 breaks you want to keep, so you use protection on them then that drastically lessens the chance of getting breaks for the other skills?

So the best way to approach was after getting 1 or 2 gold breaks from trial to then try and use frags for the rest, because while it is a slow process to get frags it is also a guaranteed success, whereas the decreasing odds from protecting breaks and the sheer volume of vials and protection you need is incredibly costly and not guaranteed to yield anything