New to Tanking- Cooldowns/Avoidance

[Mackpally]

Question: If Divine Protection, Ardent Defender & GoAK are all used at the same time is it a 90% damaged reduction & if avoidance is at 93% is the damaged avoided the last 10%.

Example:
100k hit reduced to 10k. DP, AD, & GoAK active
If dodged or parried no damage
If blocked, and damaged blocked is 50% then you would receive a 5k hit?

Any help would be appreciated.
Thanks

[KysenMurrin]

The effects of damage reduction are multiplicative.

Hit * DP * GAnK * AD
100k * 0.8 * 0.5 * 0.8 = 100k * 0.32 = 32k

Block that for 50% and you'd take 16k. (A regular 30% block, it'd be 22.4k.)

[Mackpally]

Thank you