I just use those raven hooks that are painted red. Not sure the size, but definitely not as small as most people use. Bigger hook = better hook set in most cases. Which will help you keep a fish on once he's hooked.
For most applications of steelheading, I hook it in the mesh but not near the knot of the bag and not through any eggs. I find that if you hook it under or through the mesh knot, it will be harder to rip the bag off once you need to switch to a new one. Hooking it under 2 or 3 strands of the mesh is usually fine for me, it never falls off even in the fast flowing GB tribs
Oh yeah, as for the raven hooks, I have both the type you are asking about and it doesn't really matter in my experience. That fish is gonna pound that roe bag if it's hungry and it's up to you to set the hook. However, I definitely don't use size 14. More like size 10 or 12 most likely. I actually carry various hook sizes and types but these raven hooks have been good to me this season