There's a lot of AW builds floating around, and a lot of them are strong in perilous. You actually have quite a few strong abilities to choose from and no matter what you do Fade shield will make you survivable as heck, unlike most other classes. But just in case people are wondering, the most common perilous speedrun AW build I've seen personally has been spirit blade, fade step, fade cloak, and PotA. People may be wondering, why not chain lightning? Because the following rotation should result in most mobs dying very fast: PotA, fade step, fade cloak, spirit blade, hit randomly any abilities that go off cooldown with your forehead.
I've been seeing a lot more AW without SB, and even tried it myself for the purpose of increasing difficulty, and yeah even skipping SB the AW is still quite strong. Cillian just has so much going for him. Must be the ham.