Sentinels, in theory, are agents that specialize in holding space for long periods of time, mostly defensively. Sage can wall off areas of the map and deny the enemy space with slows. Cypher and Killjoy have traps and intelligence gathering...

I think a fully-indoors map would be awesome for this game. Riot can use themes like Kingdom's basement where a crates of radianites are stored, which is reasonable because Omega Earth is after the radianites. Now, lineups like Viper's moll...