I would really not like that. That ISS is really good for DPS Knights. Would suck if it got removed.
only with an agro and a spott add, but the other seggestions arent bad for dps knights. a stun like 0,5sec can be a solution too.
Ah, gotcha! I think something that works for both, like you suggested, a stun, would be great. The skill is very bland on its own.
Perhaps a small debuff that applies a debuff that causes a reduction of damage dealt by the enemy (not stacking with "Intimidate"/"Einschüchtern") would be a great alternative.
Have a blessed day,
Midan