i dont even know how you can up with this in the first place, since linker is strictly pve and even there only useful in situations which mobbing is possible. By definition its not “absolutely dominating any other choices”
Hangman’s Knot was way too strong in PvP. If you fought a Linker in PvP with high level HK, you’d know that the disable makes the enemy player(s) afflicted by it unable to do anything. Cannot move, cannot use skills, cannot do anything. For 15 seconds at lvl 15. The fact that that could be used on multiple players, or just one player when linked with a fireball, made HK too good not to get and proved Linker as one of the best, if not necessary, choices for a PvP or PvE wizard.
Other than that, I agree with everything you said and see where you’re coming from.