This week I've had time to complete a commission to design tattoo for a brave soul who wanted a crusader battle to cover his whole back. Ouch! The design can be seen here:
Crusader Battle by *dashinvaine on deviantART
I was initially a bit reticent, as my comment makes clear, about the idea of putting an angel and a devil with the Crusader and Muslim sides, as there wasn't much to distinguish the two creeds in the era in question. I would have preferred to leave supernatural participants out of the equation.