Yeah, they didn't really clarify anything about if it will be an attractive sub for RDM.

FireStrike etc. would be pretty darn cool. If it's able to be subbed and it has MAB as a mult i heard we are great at that. You could still give RNK better versions that you acquired after lvl 50+.

It still doesn't satisfy my curiosity for this statement:
'Rune fencers will possess versatile abilities like one that cuts the duration of the next enhancing magic spell cast on them by half, but in turn amplifies the spell's effect 1.5 times, and another that erects a barrier that reduces magic damage.'

I read the word ability, and interpreted Job Ability. Yeah I want an Enhancing magic job ability that I can steal.