With Metatron's set effect...

Durability is durability, so it doesn't mean your HP increases by 30%. For example, If you have ・Durability 30,000 + Equipment HP +700,000, making your 　current HP 1,000,000 Then: ・A 30% HP increase would be 1,300,000 HP. However, with a 30% durability increase: ・Durability 39,000 + HP +700,000 results in 1,090,000 HP. It might seem weaker at first glance, but durability also increases critical hit resistance, so if you only judge by the numbers, you might later think, 'Huh, this is weaker than I expected, isn't it?'

Quoting from a past post Fear LR HP: 54,320,000 Durability: 2,560,000 (With 2x Satan's HP +25% applied) Assuming a scenario where the head, torso, and legs are changed to Mika from this state Mika's Durability +20% = 510,000 increase HP is 10x that, so 5,100,000 increase Assuming Rank 410+ HP +40% (rank unknown) Combined with Satan's HP +25%, that's +65% total 5,100,000 + 65% = 8,410,000 There are other factors, but unknown, so let's set the stat HP increase to 8,410,000. Estimated HP: 62,730,000 or more Q. So, what's the total HP increase percentage? A. Under these conditions, it's a little over 15%. Not all 4-Mika setups result in 15%. Q. What about in meta builds? A. In meta builds, the original HP increases due to enhancements (凸), making calculations difficult. In terms of percentage, it would likely drop significantly below 30% and end up around 15%.