Twisted Treeline Map Specific Buffs (idea)

So we all know about the twisted treeline map specific nerfs to keep dominate champs in line in a game that is balanced to the 5v5 map (i.e. singed, renekton). What about champions that are never chosen for twisted treeline because they do very poorly in the bruiser dominated environment? Don't they deserve map specific buffs? For example, marksman in general do rather poorly on TT because bruisers with gap closers are picked often and counter them well. I don't think anyone would be upset about some small map specific changes to the base durability stats on underplayed champions for TT. I mean, if i want to play jinx on 3v3 I'm likely to get some push back from my team in champion select, and for good reason. Maybe not the level 1 stats, as most ranged champs do well at lvl 1 laning, but by the mid game most ranged champs are taken down too quickly to be helpful. This is fine for a 5v5 setting where you have teammates to back you up, but 3v3 puts much more value into the ability of individual champions to keep themselves alive. I believe this calls for a little bit of change to help out these squishy teammate dependent champs.

P.S. this is my first community post so feedback is appreciated :)