Build a miner than can mine a quality coin at 25 percent better than public,
Already did.
X17,X16R,X16S,C11,Lyra2z Prices starts at 0.5BTC. Pm if you are interested.
Yeah, and ROI on those algorithms will be close to infinite even for huge farms, especially when a 1080 Ti earns less than $2 a day before power.