i dont think high guard not working mostly because of gameplay is too boring.
with map this big 3v3 is really a snail race
and economic in the game not really make sense for the game with only 3v3
6v6 or 8v8 would make game more engaging maybe make a role for team economy, specialize to mining to help team building gear and defense, or focus on other role for rush strike but bad items after a while if they cannot quickly win the game.

so far, neh