Does arena rank matter?
Because previously I had easy battles (starting from lvl ~25 while I was lvl 42-43, and last battle was usually ~1 level higher than me). But my arena tank was 700+ (super low for my new server).
Today, after I got arena rank of 120, I got much tougher opponents (I'm lvl 43, first opponent was lvl 42, and from 6th castle they are higher level than me with much higher hero rating).
This could be a coincidence, though. I already had tough days 1 or 2 times out of 10.
Small off-topic - my new shiny Merlin feels weaker then Stryker at sky arena (he is same lvl same skill lvl same equipment, ~1500 rating both). Everybody says Stryker sucks and Merlin rocks. He will become stronger later in the game, I guess? At lvl 60+ and purple+X?
Edit: I guess, Merlin's 4th ability is much better, that's why he is used more endgame.
Yes It Matter.
Sky ARENA is based on your arena lvl and your heroes rating (the 5 more powerful).
There is some randomness, but for sure you will problably never face someone below your rank in arena at castle 9 and 10.
I was arena ranked about 1500, and only faced 60-70 guys from castle 7-10. I dropped my rank to 2900, I can make floor 10 every day.