Only issue with party target-able spells is you get stuck into brain damaging cycles and it conflicts with enhancing duration gear vs enhancing potency gear.

Now this could easily be mitigated if SE were to adjust them so their casting time was .5s similar to stun with a really low recast of a few seconds. Then I'd happily spam a set of spells onto 4~5 people. But having 5~10 second cast times and asking it for 4~5 people with two to four spells each is just asinine.