Minecraft: 1.12.2
Forge: 14.23.52772

Mods: 5
Mantle-1.12-1.3.3.39
TConstruct-1.12.2-2.10.1.87
TinkerToolLeveling-1.12.2-1.1.0
AoV-1.12-0.8.14.jar
TamModized-1.12.1-0.15.5.jar

The Skill Trait 'Defender Core 4'... which allows you to block from all sides while using a shield... prevents the use of the 'Spiky' Trait from Tinker's Construct.

'Spiky' damages mobs if you block or take damage from their attacks. I am aware that 'Blocking from all sides' is rather powerful as long as your shield lasts but I bet it would be quite broken to have Spiky work alongside blocking from all sides as mobs would get wrecked left & right.

Would there be any possible way to disable the 'Defender Core 4' if the 'Spiky' Trait from Tinker's Construct is in effect? Unless doing a Minor Reset patches that but I guess it's a suppose trade-off if you want to deal damage by blocking or be shielded from all sides while blocking.