Mistweaver utility expectations

Just got my Mistweaver up and running, currently at +10-12 range and feeling pretty comfy. Whenever i watch youtube gameplay footage (much higher keys though), the mistweaver always does a load of utility. Paralysis this, paralysis that, ring of peace ere etcetc. Are there ever expectations of a mistweaver to do that stuff in PUGs or is that strictly for pre-decided strats in synchronised teams in higher keys?