I have champs for another go-second team, but they are not fully built, I don't have Arena level gear for them. I'll need to check how fast my Kymar is, but I use him in other teams.
I'm only in Silver IV, the Arbiter does fine there. The problem is Stoneskin can turn a crappy speed team into a go-second team if you don't bring a buff stripper, and even there, you're playing with RNG. In my position, I still have to distribute my champions according to where they're needed, so when I go up against a 169K team with a Gorgorab lead, I'm comfortable putting this team up against them. But every now and then, their team just wears all Stoneskin, and now your team is sitting ducks. For something that can transform a battle so much to not be seen is just too much randomness.
I don't see what's so mysterious about Stoneskin in top Arena tiers - every reviver, cleanser and tank is in Stoneskin...who are we hiding from? If I go against a team with Mithrala or UDK, I just assume they are wearing Stoneskin. Same with Hephraak and Mortu. If I'm wrong, even better. Are you afraid someone will see that those champs are in Stoneskin?!....or are you worried that someone will see that they're NOT in Stoneskin?
I absolutely want to profit from people who look at my Kymar + Kimi + Ukko + Gaius team, and don't recognize that all four are wearing Stoneskin and using Lightning Cage, yes.