Post pointless PvE abilities and how you'd make them relevant.

[Viridiana]

One ilm punch needs to be useful in some form. I have no idea how they could make this skill better, I honestly wish they would just remove it and replace it with a oGCD skill that refreshes your GL or gives you one stack of GL with a ~2Min cooldown.

Another option might be making it affect more buffs, though that would still be niche and would probably be OP in that niche. . .

Yet another option might be replacing it with an aggro dump.

[Lyzern]

Repose

Sleep

Sleep II (?)

Slow attacks (Feint, etc)

Slow movement spells

Binds

Certain monsters in dungeons hit a lot harder;
Pairs of monsters that work together with debuffs (One of them increases target's damage taken, the other decreases healing done, for example). They would be deadly together but easy to kill alone.
Certain monsters would go into a rage increasing their damage/defense/speed/AoE and you'd have to sleep/kite them with slow/stunlock/freeze them until their rage is over.

Basically, make the game more tactical and more intelligent to play. I'm not saying do this for allll the dungeons, but certain, harder dungeons. Maybe Extreme versions of current dungeons.