question about crimson guard and vanguard

[Eulivere]

if i have this 2 item i will get block damage 70 or 140?
block chance 50 or 100?

[A Street Sweeper]

The block doesn't stack, but the chance stacks multiplicativly. So not 100 but it's 2 x 50% chances which works out to roughly a 75% chance to block 70 dmg if you have both items.

[Eulivere]

thank you

[Shichiya]

50%+the left 50%/2=75% trigger chance

[Water Ｖａｐｏｒ Merchant]

Originally posted by Dr Taco Monster:

The block doesn't stack, but the chance stacks multiplicativly. So not 100 but it's 2 x 50% chances which works out to roughly a 75% chance to block 70 dmg if you have both items.

I thought sources of damage block did not stack with other sources of damage block. I know for sure that Vanguard is an absolutely useless item on Tidehunter for this reason. His Kraken Shell takes precedent, and so he doesn't gain the damage block benefits of either Vanguard or Crimson Guard. I thought this also applied to the items' interactions with their previous iterations (ie, Vanguard takes precedent over Stout Shield, Crimson Guard takes precedent over Vanguard).

[A Street Sweeper]

Originally posted by Dr Venture:

Originally posted by Dr Taco Monster:

The block doesn't stack, but the chance stacks multiplicativly. So not 100 but it's 2 x 50% chances which works out to roughly a 75% chance to block 70 dmg if you have both items.

I thought sources of damage block did not stack with other sources of damage block. I know for sure that Vanguard is an absolutely useless item on Tidehunter for this reason. His Kraken Shell takes precedent, and so he doesn't gain the damage block benefits of either Vanguard or Crimson Guard. I thought this also applied to the items' interactions with their previous iterations (ie, Vanguard takes precedent over Stout Shield, Crimson Guard takes precedent over Vanguard).

I think that's unique to Kraken Shell.
I haven't looked at it in a while, but I know this at least used to be the case with dmg block and that's why it was worth getting 2 x stout shields for Axe at one point before Iron talon was a thing.

Otherwise it's just the higher block takes precedent, but they both roll. Same as stacking sources of crit.

[graystripe]

this is written about damage block.

Only one instance of Damage Block can proc at a time. When multiple sources of Damage Block are present, the source with the highest blocked damage is checked first, and only if it does not proc any others roll. In other words, when two sources of Damage Block have the same chance to proc, the one that blocks more damage takes priority. While the amount of damage blocked from multiple Damage Block sources does not stack, the proc chance stacks multiplicatively. For example, when having two Stout Shields, the chance of blocking damage becomes 50% + 50% * 0.5, effectively having a 75% chance to block 16/8 damage.