Higher HP = Worse QR?

How much damage is your Henry taking to where you'd need to worry about keeping Quick Riposte up?

He only takes like 0-5 damage anyway. ( ͡° ͜ʖ ͡°)

Let me make an example to why it doesn't necessarily work that way:

Take a unit with 40 HP vs a unit with 50 HP. To fall below the 70% HP threshold, you need less than 28 HP and 35 HP, respectively. For the first case, the unit can only take 12 damage before dropping out of range; the second case requires that the unit take 15 HP.

Yes, the HP requirement is naturally going to be higher for higher HP units, but the higher HP units can also take more damage before dropping outside of the HP range.

While that may be true, more HP also means that you get more HP in the QR range. For example, Henry has a base 45 HP at Level 40 5 Star. 70% of 45 is 31.5. This means that he has a margin of 14 HP before QR3 stops working(if the game round down). If you gave him a HP boon, He would have 48 HP. 70% of 48 is 33.6, meaning that QR3 stops working once you lose 15 HP(again, assuming the game rounds down). This means that more hp gives you a bigger HP area for QR to activate

TL;DR moar HP=moar QR