I peaked at 3.3k as an EU Terran, so take this with a grain of salt. But when playing mech in TvZ, I found it really difficult to deal with early baneling busts if I went heavy on hellions. Blue Flame means delaying one or more tanks, and microing hellions against lings when defending is not easy.
The truth is that mech openers are just kinda bad in general. I think if you just continually crank out hellions and then kite away from the ling/bane during a bust you should survive though.
I peaked at 3.3k as an EU Terran, so take this with a grain of salt. But when playing mech in TvZ, I found it really difficult to deal with early baneling busts if I went heavy on hellions. Blue Flame means delaying one or more tanks, and microing hellions against lings when defending is not easy.
The truth is that mech openers are just kinda bad in general. I think if you just continually crank out hellions and then kite away from the ling/bane during a bust you should survive though.