Heh, I watched this one over lunch. Very fun.
And protip: your stoneskin expires after being hit, not after attacking. Really awesome last-minute glyph find, though.
Oh, so I can attack the enemy with fire as much as I like and I'll keep the stoneskin until I'm attacked? It's a one-off protection against the next blow, right?
Also, I'm not understanding the two buffs that ENDISWAL gives. One seems to be a generic physical resistance while the other has a wall icon and does... the same thing?