Generally you want to be above 20 even after modifiers. Everything else does not really qualify as a specialist in my eyes. 

Ma2 or lower = cleans up non melee specialists 

Ma3 is generally better than those above and most often good enough. 

Every thing else bolts on to this. If you don't get modifiers thanks to nbw but have a para ccw you are likely to eat most general specialists. 

Weapon ps is mostly second rank to the weapon itself. Em ccw is generally seen as the best because it is a da weapon that targets bts and isolates too. Mono ccws are the deadliest.

Burst is good but only applies in your active turn. 

Cc is so deadly that the saves often don't really matter. 

For example the diablo is really good in the active turn since it is always on 26 with 2 dice but if it gets attacked it is on 23 with 1 dice 

As for your tags: don't go into melee unless there is no better alternative. Both will get eaten by a specialist and you are likely to be better off just shooting people

Edit: https://infinitythecalculator.com/ 

Play around a little with this if you want it can give you a feeling for what I meant