Hi, i'm looking to make an spreedsheat to calculate AS, MS, DMG and everything but i have some questions about stats.

-Agility reduce the time between ticks on channeling spells? Theres a formula for that?
-For the damage reduction(DR), are they summative or multiplicative?
-Blocks reduce the incoming damage in 100% or just based on the block efficiency(BE)? If that's the case, BE reduce the damage before the DR are applied or after?
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Best regards.
Johse.