How viable is running a double Skadi or even triple Skadi team?

You're going to have to stall until the 3rd turn, forcing you into a corner in arena

For PvE, it could work against teams who don’t move until you are in their range. But PvP would not only be unforgiving in that aspect, but it would score very poorly.

I think one, maybe two Skadis would be enough, and then once your opponents are on 1 health, used a ranged cavalry along with dancer(s), etc. to finish them off. Although it would be downright terrible in Arena and Assault since the AI will move without your initiation, I feel like in Chain Challenge (unless they have a new update), that Skadi is going to be super broken. Just imagine having someone on low health with Distant Counter and Vantage, waiting for Skadi to reduce everyone's HP to 1, and then just throwing them in- too hilarious to think about lol