All my main hero skillz are at lvl 23 and most of my hero aids are ok. I have 28k rings what should i work on, main skillz or hero aids. My pan goli aids are low lvl.
I would say it is ok to invest in an aid skill at that point if it is Berserker, Enchantress, Ravager, Sapphirix, Blockhead, Penthesilea...
Some aid skills really make a difference.
But if for instance you are going for enlightment for 1 hero in particular, depending on the hero it would worth to get to skill 30.
In wheelie <3 we trust