Honestly, y'all are forgetting that the Xenomorph Queen has Large Size on her profile, which is already a huuuuuge disadvantage for the Danmaku, given that leaves relatively little space for a human kid like Frisk, let alone a 4-6 m tall monstrosity, meaning that Stealth is not helping, especially when said danmaku is tens of meters range-wise.
Plus, I think that the Xenomorph Queen will die from being hit like... max two or three times because Toriel's fire being on par with Asgore's, which deals to Frisk damage unlike Pyrope's explosions, which don't do any damage to Frisk
despite being hit from Pyrope's explosions at max heat made to them nothing, and Toriel is on par with Asgore who massively outscales above Undyne who is stronger than Pyrope in pure STATs, so the gap is waaaaay above x4.88.
Plus y'all seem to also forget that Toriel is all the nice goat mom only towards kids like Frisk, it was implied multiple times she can harm someone if she has to do, like her threatening Froggit or her being fine with the idea of Asgore killing 6 humans (but not with his methods to get 7 souls obviously), so the SBA would make Toriel indeed willing to kill here.
Aka voting Toriel because of Danmaku, AP advantage and heat advantage.
(Maybe is a stomp because of this, but unsure).