Zardnaar
Legend
The point is that lowering saves and making it 3 rounds makes the problem a lot worse. Control spells only need to work for 1 or 2 rounds to destroy an encounter at the current save levels.
This. Command for example is usually a tempo loss. Vs Solis or a few critters (generally 1-3) it tends to hose them. 5.5 its easily twinned as well. Very low opportunity cost.
Hold spells basically a death sentence. A tier 2 champion can critters 10% of the time. 20% roughly using vex and inspiration (eg lvl 10). Paralyzed that becomes 100%. Also easily and cheaply twinned.
Fodder doesnt matter due to spells like spirit guardians. Party composition matters sure but theres usually other ways of doing it.