[Exxy]

The passives not being stackable seems to be the thing most of us are fine with.

[Rendar]

Well. Them not stacking still makes you 90% physical damage immune. Which is still not really okay.

[Lolzytripd]

but that build is so gimped its a joke

just pop an arcana potion

[Snake]

Buster Cannon gg.

[Neus]

They are now treated as Defensive Knowledge skills and are mutually exclusive (in reality, they both give the same effect), and so no longer stack.

Further adjustments can come later if necessary but as two people mentioned above, there are some easy ways to abuse a lack of magic defense and so I think this build is only really a problem for over-specialized physical damage dealers. It already was, but being able to deal absolutely NO damage was reason for a change, and stacking these two skills was a problem outside of this specific build anyway.