A notha, TML, and 4 loaded missiles, converts to 5 nothas. it's also really hard to not kill 4 t2 mex with 5 nothas. they are free to reload, help fight air, are not restricted to a maximum range, and they will even 100% consistently kill the mass storages around the mexes, so maybe nothas are the most OP form of aggression in the game. or maybe even t2 arty drops
if you're worried about nothas or t1 bombers bombing tmd, maybe you built t2 mexes too far forward, or you let the opponent build a tml too close to ur base
i only think tml acu is busted, regular tml is very strong but not broken imo