Comment below rating threshold, click here to show it.
I do not know if this is technically feasible, but would it be possible for players to have separate rune and mastery pages for Dominion games? Or additional pages in general?
It seems clear Dominion games are quite different from Summoner's Rift matches. It also seems like different Summoner Spells and mastery/rune mixes work well on the map.
Players have favorite mastery/rune configurations for each map, and each role they are playing on a team. It appears that this will continue in Dominion. Extra pages would facilitate that. I know that I would be prepared to pay additional IP and/or RP in order to buy them, if that was the model Riot decided to use.