If Paragon is your biggest problem in void affinity dungeons or arena, Ronda is indeed a great champ to stop him. But any champ in a stun set could do the same.
I built Ronda as well, but Paragons are not the reason why.
Yes i know about the stun set, but problem is, sometimes it can take 27 turns for the stun to land, and sometimes, just one turn, you have no control (I only have 1 champion in that set i can use in arena, the others wearing some are FW fillers)