damage reduction cap?

I think I remember you saying it was monsters dmg redux caps at 95% for non-magic weapons and 85% for magic. I am correct here? when you say "non-magic" does vanilla +4 count there as well?

and here is the main point of the question... what does a player's damage reduction cap at? because with a protection +4 weapon used by a medic or doubled and used by an AM will exceed 100% reduction

Trooper wrote:

I think I remember you saying it was monsters dmg redux caps at 95% for non-magic weapons and 85% for magic. I am correct here? when you say "non-magic" does vanilla +4 count there as well?

and here is the main point of the question... what does a player's damage reduction cap at? because with a protection +4 weapon used by a medic or doubled and used by an AM will exceed 100% reduction

First for monsters:
With the latest build 226, all RPG weapons will do a minimum of 50% damage after the DB/DR adjustment. RPG weapons include all weapons with a modifier, as well as the ones with descriptions like Sturdy.
Non-RPG weapons against a high level monster will do 0% damage - which gets rounded to 1 damage.
Super weapons do not go through the DB/DR calculation, and so will do 100% damage.

Damage reduction for players is not one thing - there are a number of separate issues.
First, there is the DR as in DB/DR. This maxes at 50, so for an attacker with zero DB, you will get 25% damage reduction (0.5% per point). Monsters will however normally have more than 50 DB.

The Protection weapon protects against most things except poison. It reduces damage by 10% per modifier, so you could get a max of 50% damage reduction using this. (An AM could double magic modify this to get 100% damage reduction, but the globe would be safer as you would still get perhaps one damage per hit but could also get momentum/falling damage)

The medic damage reduction reduces damage by 4% per level, so a max of 40% damage reduction.

So consider a medic with level 10 Advanced Reduction and a +4 protection weapon. Faced with an initial damage of 100, they will suffer 100*0.6*0.6 = 36 damage - so just under 2/3 reduction.

However, there is still the DB/DR calculation. If the player is level 600, then the monster could have ((600/4)+(16*2)) * 3.5 = 637 DB, which gives it (637-50)/2 = 293% extra damage. Leaving the damage at 36*3.93= 141 damage.

oh ok so the damage reduction stat, the medic damage reduction, and a protection reduction are all % based on a multiplication type... so if the monster after its db does 100 dmg then 100*.75(for the dr stat)*.60(for the protection 4)=45 dmg. am I understanding this correctly?

Basically yes. The Stats DB/DR are applied at the same time, but yes the others are independently applied multiplicatively.

much appreciated