It’s a high risk/reward build. But within game system boundaries. It’ll get riskier in tier 2, levels 5-10 when monster damage can exceed 30% hps. I’d focus on winning initiative to mitigate.
If BG3 throws around Dispel magic like BG2 did, I’d plan on potion buffs lasting half a big fight. That said, if you prioritize stocking up, you’ll be ok.