Guild Wars 2

there are two components of this skill that I would like to address
Direct Damage
Condition Damage

I compare mark of blood to Shrapnel Grenade and Fan of Fire
as you can see all 3 skill are short cd aoe skills

MoB does significantly less direct damage and also less condi damage
however MoB can be placed b4hand and has an easier time dealing its full damage
considering all these facts these are the numbers ive come up with

MoB Direct damage should be equal to Necrotic Grasp
MoB Condition duration should be something like bleeding3 5-7 seconds

MoB gives regeneration.. neither of the skills you linked do. You’re not taking into account the utility, which is the purpose of Staff to begin with.