When playing this weekend I had a fight involving skaven and the skaven had 11 total action cards. Different effects etc., but I started thinking about the sillyness of this. Actions are very cool for players, but for the GM I feel they are just in the way at times.
I am thinking about simply making one attack action that can be used with all NPCs. As a GM I would simply pick different special effects, conditions and such according to successes, boons, comets, banes and stars. You could also make a list with different effects or just be inspired from other action cards. Every NPC would have all the basic attacks, plus this one. The attack is used for every possible attack from melee and archery to spells. As a GM you could then simply pick effects that makes sense for that particular NPC. Beastmen doing a lot of criticals, skaven causing corruption etc. I'll give it a shot in my next session, but I'd like to hear some input. It can be used against a targets defense or as an opposed check or whatever is needed. For each extra challenge die put in it has extra damage, to simulate more powerful attacks/spells.
When making NPCs for scenarios you could list special effects as part of the NPC description.