i think incentives heavily relies on accessibility and the distribution of rewards
because if you lets say, give warring really good rewards or exclusives, you also have to make sure smaller guilds can actually benefit from it, as the current system offers practically no real reward to guilds who cant hold (and holding is really costly since you need active players to cover all timezones), you also have to reward people for attacking without ending up with people trading terrs (cough cough ffa)
and then yeah warring itself is also really gatekept by both the game and community (community gatekeeping makes a lot of sense since this is competitive afterall, mainly just the game giving practically no real instructions), ecoing is also nearly impossible to understand without guidance but the problem is how are you gonna make ecoing easy to understand without ruining the variety of strategies and interactions that arise from it
dps is probably the easiest one to solve out of all if the game is balanced (spoiler: it isnt) eventually and just tuning war tower stats