Here im naked without any equip, my maxhp = 32446
Now let see my maxhp equipped with Anti-Magic Suit with Toxious Card, my maxhp = 35690 (this one only add from enchantment maxhp 5% and Anti-Magic Suit itself)
I did compare it with PecoPeco Card (add maxhp 10%) on Anti-Magic Suit, my maxhp = 38935
I also try combo Toxious Card + Noxious Card (Giant Faceworm VIT 4/VIT6), it should be add maxhp 15% but as u can see here my maxhp is lesser than PecoPeco Card.
I dont know how to test long range reduction but from maxhp itself it didnt add up at all.