Also, secret passages speed up movement yes, but they also block line of sight, teleports and pushes through them. Which means that it's not quite a counter to a larger distance between starting zones. And it's only useful for larger distances between starting zones, otherwise you start having issues with range, like I said. A map shaped like path of war is only 12 zones, and without using the secret passage there is a six zone difference between each mage's starting position. If you try to go through a secret passage in the corner where it's normally/best placed, your line of sight will be blocked to them even if they are one move action away.
And if you try to make the board itself smaller while keeping the secret passages, you start getting range issues. Perhaps now you're only 3 or 4 move actions away from the enemy mage using the secret passage, and 5 away in the direction you have line of sight.
The corrosive pool and molten rock do damage yes, but a turtling mage will just stay where they are and never enter it, and a rush Mage will either have to move through it to reach the enemy or just go around it, depending on the size and shape of the board. If the rush traps the enemy Mage in such a zone, I suppose it could speed up play at the end of the game, since it makes it harder for them to escape and causes extra damage.
So I suppose the main issue is shape and size of the board, and the use or lack of secret passage. I'll try again. Maybe if I start with path of war as a template and remove two zones or so from the middle, and take out the secret passage...
Maybe secret passage and board size can be used to counter some of the terrain zones. After all the balance issues with range could be mitigated with ethereal mist and septagram.
I'm rather hesitant about arenas with a smaller distance between starting mages than five though.
This still might be an issue, though, since I'm not sure whether the terrains, secret passage and map size really quite balance each other out. I'll have to think more about this.
Thank you so much. While some of the things I talked about above might still be issues, I suppose they might also not be. I spoke too soon, need to test a bit more first.