[Poruku]

I definitely agree, it has nothing to do with arbalest.

However, elemental resists are not a big concern most of the time. You're only rarely gonna run into someone who can resist your stuff significantly, so turning damage to akashic is at best allowing you to soften the blow of being hard countered. Akashic does nothing different than another random element against like 90% of foes. The best comparison is winter's bite. Only used against your counters, making your strategy more consistent but not stronger.

All that to say, as long as we don't make it do ridiculous extra damage there's no way that can be busted.