Balefire is a strong exalted ability when combined with armor stripping. It also gives [Hildryn] a free way to get shields back. We utilize a subsumed QoL ability to fix further increase it's effectiveness.
Fire Blast is chosen because it further increase our armor strip potential. Balefire doesn't want to completely strip armor anyway as we want to abuse the increased counter Health Type damage. Pull or Empower should be swapped in instead against Infested. Haven is replaced because it's useless on this build.
Duration and Efficiency are dropped a bit because Balefire doesn't need them. Pillage has enough range even with only 1.5 seconds of duration and direct hits from [Balefire Surge] will keep your shields constantly topped off.
Arcane Barrier and Arcane Aegis are defensive tools that significantly increase the QoL on [Hildryn], especially when they're run together. Either can be swapped out for offensive arcanes or even Arcane Resistance.