Thinking about the Piraka’s vision powers and how they're linked to their personalities.
Hakann is a bully and a manipulator, so his mental attacks and heat vision are pretty unsubtle metaphors for what he does to his allies and enemies alike. Fucks with their heads, and burns them in the end.
Thok is also a manipulator, but a much more insidious one. Thusly, his "spellbinding vision", which goes underutilized to a detrimental degree. We barely even know what it does other than make you lose your balance, which feels way too situational. My personal interpretation is that it works more like hypnosis, making the victim fall into a suggestive state so long as he's got eye contact. He's no Takadox by any means though, so you can snap out of it fairly easily if you figure out what's happening.
Avak's got both x-ray and telescopic vision, and both would certainly come in handy when making weapons and firing them at longer ranges. But you would really have to stop and think when you're using them, or you'll get disoriented, like running with a pair of binoculars on. They're tools of strategy and survival, not combat.
Reidak is an interesting case. His thermal and infrared vision would be useful in both strategy and keeping track of his marks, but like Thok, these abilities go underutilized. However, this serves more as an interesting look into his head. He is smarter than he lets on, he is fully capable of strategy, but he doesn’t want to because being the 'dumb muscle' is more fun.
I'm not sure about Vezok or Zaktan, but I'd love to hear yall's thoughts!