>>535116031
2 is enough
unless the second one is some dogshit like Breath of Fresh Air or Iron Will that is unreliable

When unsure use the Calculator https://alpha123.github.io/uma-tools/umalator-global/
Input your Uma in there and click show Hp consumption
If by the end your Uma has around 200-250hp left. She is good on Stam and will survive debuffs.