Can we have it changed so that Brace is spammed on ANY hit if a Brace improving ability is active? e.g. Metalmark 1 Reactive Weave, Drake Fortress Protocol, Nelson 2 Armor-Lock Plating, Napoleon Flash Aegis? For Reactive Weave it can be a very important tactical choice to go Invisible and move Speed (as well as obtain the minus Accuracy until the end of your next turn) beyond just the damage reduction for the one hit. If you're going to have a global Brace threshold I'd suggest you put up a poll on what to set it at. Or say a regular Brace might take 9 damage to 5 (saving 4) but you'd get the same savings on a 5 damage for a Napoleon (Flash Aegis) where it takes it from 5 to 1 (saving 4).
Finally if you're going to implement a Brace spamming option for these special cases, maybe make it so it can be turned on as an option globally since that is probably pretty easy to implement at that point?