Buff a sniper is not an good option i would say, it was an AOE damage(FAS) it just could be another broken killer machine. But DS is doable for buff, the DPS for Ds is bit low compared to other ranged skill (arrow vulcan as example). It's good on pvp scene .
Regarding whitesmith i'd still say it was broken. As previous persons stated, it was counterable by high priest card (assumptio) and pnuema card. The thing is the damage itself was around 90-100kish. I faced some ws, it tooks me around 5,6 hit for assumptions, either i died by that superfast spam no i burned my seeds. We didn't even talked about vulnerabilities to stone cursed while with ship captain hat & variations of it, unlike other ranged class can at least counterable by puppetring.
Gs is okay, though i feel unfairness toward gs. They got so many nerfed, delay,sp consumption,hp. But at other side they were glass cannon range anw. So it's cooh