Hey. So suppression damage reduction is actually hard-capped at 75%. This is tucked away in the Season 1 patch notes, but nowhere else. The UI is bugged and will happily show you having above 100% instead of stopping at 75% and turning yellow to indicate a cap, but mechanically the game will still cap out at 75%. (There is no soft-cap like normal DR.)

@Rigg: Suppression DR is multiplicative with enemy attack suppression bonuses, AFIAK. So if the game did let you have 100%, you'd be immune. This is much like the DR and resist stats---if you could get 100%, you'd be immune. The invincible double-armoured bug that's been floating around is actually a result of this: armour is an internal 40%/80% additive stat, and the bug was a condition where it accidentally didn't get capped properly, rendering enemies immune.

101% suppression damage reduction not guarantee 100% immunate to sup damage. just + 100% то basic. but enemies can attack +150% +500% for example from basic depending on the level difference.