Cool, thanks. That makes the damage interval for the RoS pet ~1318 ((31642 - 6596) / 19 = 1318.21). The damage interval for the ToV pet is 1712 ((42358 - 9830) / 19 = 1712). The damage base for the RoS pet is therefore ~5278 (6596 - 1318 = 5278). The damage base for the ToV pet is 8118 (9830 - 1712 = 8118). The Shielding Mod2 with a Cloak of Enhancement would be 35%, which mitigates the damage base value. Applying 35% shielding to the ToV pet's damage base value would yield ~5277 (8118 - (8118 * 35%) = ~5277). That's essentially the same as the RoS pet's damage base, meaning the new pet has 0 shielding. The Innate Defense worn modifier applies to the DI portion of the roll. If we assume the RoS pet has Cloak of Enhancement XXIII (which applies Innate Defense XXIII), it would have a 23% reduction in DI value. The ToV pet's damage interval was 1712; applying a 23% reduction gets you to ~1318 (1712 * 77% = ~1318). TL;DR: The ToV pet is missing a Cloak of Enhancement and is therefore taking significantly more incoming damage. Cloak of Enhancement XXIII or higher should put it in line with the RoS pet (the HP on the new pet is quite good, and it looks like the AC is an upgrade as well).