I played pretty much the exact build in CBT2 and loved it. So, I have the same concerns as you regarding the linker nerfs, namely the CD increase for Joint Penalty and the bind duration reduction for Hangmanās Knot.
Based on high level gameplay, the 22s JP CD probably is tolerable in fields. Itāll slow down the leveling rate a bit, but it takes time to gather 8-10 monsters anyway. In dungeons though, the CD period would probably mean that you can only cast it once every 2 groups of monsters. If you are a support-oriented build with not much DPS, then thereās really not much you can do during that downtime. The CC capability has also been reduced greatly. Even with maxed HK at circle 2/3, thatās probably not sufficient time to hold things in place if theyāre elite monsters. Iām thinking of testing it out in game to have a feel for it myself.
Keeping in mind all the recent nerfs, it seems like linkers would work mainly in a party with single-target DPS, like archers or swordsman classes. I still might go this same build myself, if my friends decide to play those classes again. Otherwise, the cookie cutter build of Cryo3 Chrono3 seems like a much better option if your partyās DPS comes mainly from AoE.
Regarding your build specifically, I allocated my points differently, but itās mainly based on personal preference. The only thing Iād mention is Iād move the points from Ice Blast to Ice Bolt. Having level 5 means you can cast level 1 bolts with a tap, while Ice Blast is pretty much useless. Backmasking is ping-dependent and caused crashes a lot in CBT. Iām not sure if itās been fixed since.