Look at 1:40, the boss moved right after Hangman’s Knot was cast. I never said HK doesn’t work on bosses, I said I don’t think bind works on bosses.
I thought the bind didn’t work there because the Joint Penalty link broke due to the Fire Ball using up all of it’s hits, causing the link to disappear. The other bosses seem to be bound 
Well back to the fact that we have to test it out.
The Fireball is still there, in fact you can see its debuff applied on the boss afterwards (the 5 second Flame Debuff attribute)
Fire Ball is a weird skill TBH. Let’s say that you have Fire Ball at level 10. It has 10 hits before it disappears however, what the Fire Ball actually does is when it first touches an enemy, it releases 4 explosions (IIRC) costing 1 hit each even if the enemy is no longer there. So overall you have 3 repetitions of 4 explosions with the last only having 2. When the last repetition is being used, you cannot hit the Fire Ball anymore and as such, it has no hit box anymore.
The Burn debuff also isn’t a 100% good indicator that the Fire Ball is still there since even during the final repetition of Fire Ball, the Burn debuff can still activate.
edit: I also forgot to mention this could have been a visual glitch as you see the boss teleported a few pixels away from the initial place it landed from Hangman’s Knot and only moved back to the first spot it was supposed to be bound to.
Erm you can even visibly see the Fireball (and even the JP line if you pay close attention) as the boss moved. Welp it’s useless to argue any further and we’re going off-topic anyway. Let’s just test it out ourselves next CBT.
true it will be too good to be true, consider a situation where you’re facing boss that could summon units, link them and electrocute will drop their hp (ofc i don’t really know about the durability of boss, but electrocute + link + enough enchant will deal about 150%+ damage anyway, moreover if 1 unit managed to get frozen)
will test Wiz->Cyro1->Linker->Elem3 though if possible, the crowd damage potential seems nasty :9
I tried wiz c2 -> linker during icbt1, was trying the build of wiz c2 -> linker -> elementist.
Had to party in the early phases due to SP issues and dps output of spells. Afterwards going into linker it’s easier to solo grind.
The link ‘magnifies’ with AOE skills imo. Tried to hit 3 mobs with Earthquake and the linked mobs not within the Earthquake radius got hit also with the damage received by the 3 mobs. So i guess the damage calculation have to take into account Earthquake’s damage + 10% attribute from the physical link skill.