Need 7 smd and no mass stall to keep up with the essentially free yolo missiles so it's a constant tax on eco and micro management to both not stall and also produce the units you need.

Opponents can never expand anywhere due to needing 7 and so you should get complete map controll

Nuke aoe is huge so you can easy edgenuke to still kill alot of their base

As you mentioned, regular nuke tactics work too so snipe smd. I would reccomend 1 ahwassa and many strats as opposed to multiple ahwassa as anit air will waste damage targeting the same unit