Reading the background concepts I thought this trait might make rune more viable to tank or if nothing else live longer

Mystic Deflection- trait; will allow rune fencer to parry magic based DMG with a higher % rate.
Runic conversion- ja; on successful parry of magic DMG converts % of DMG into HP with hate gain.
Runic burst- ja; same as conversion but it'll add a % of bonus DMG to next lunge.
Runic boost-ja; same as above but will boost effectiveness of wards.

These still are just basic outlines still.