TG RD is definitely the better set since it plugs stall like no other which is the main reason to use Manaphy, but stall still has Ferro as a somewhat annoying resource against it, but indeed the beauty of the set is that it's self sufficient in that you only need to fish for burns on Ferro on the switch before attempting a sweep, thus still not requiring any external support. But yeah, basically, TG 3 attacks still exists nonetheless and if you're relying on non-Chansey/Clefable counters, you're always going to be having a hard time due to coverage deciding your fate, thus my point was simply that having pink (one or both are on most stall teams by default anyway) + a TG RD counter like Ferro is pretty much the best you can do. They're either running TG RD 2 Attacks or they're going TG RD Scald Rest, and that second attack will be the flavor of the month coverage move (Psychic in XY) but if things like Celebi become more popular and since Venu and Amoong have seemingly fallen in usage quite considerably on stall, that flavor of the month move could easily become something like Ice Beam, in which case Celeb and niche things like Water Absorbers could be potentially useless anyway.