mine layer is basically like anti leak unit and if the front defense failed they gonna clean up those enemy that leaked and prove to be good unit for back bone of the defense and if the boss leaked their mine will do massive damage against the boss leaving it low on hp if those mine layer were stacking up their mine alot depends on how much mine they placed and also getting minelayer proven to be good benefit for your team as enemy can get leak also your team can place down all tower they got at back side soo they can kill the boss because mine layer already lower its hp for them to handle it and that is my explanation if i made mistake please let me know
Man, I remember when expert was actually difficult ans you needed a variety of towers to beat it. Now I go in with g ranger, warship, grenader, and armored factory and just sit back and relax XD, rn endless kinda took experts place as the new challenge
Honestly though i would respect peoples opinion about what game is better but honestly ttd just sucks, i could take a giant shit im the bathroom and it will look better then ttd
