QoL and reducing number of the buttons suggestion

[Reinhardt_Azureheim]

The only way to combine those would be if you just gave the AoE version the potency of the single target version... Which for most bosses wouldn't matter but if there was ever any fight where you had adds or even a second boss, they'd become rather powerful.

The biggest thing for pruning extra buttons is more that you have skills that require a different skill or a buff from a different attack to use... Like for SAM, you can't use Tsubame without Iaijutsu, or Namikiri without Ikosihoten.

Or, since at least Heavensward, give the single target version the AOE effect with reduced potency. Hissatsu: Guren already has the "and 25% less for all remaining enemies" clause for AOEing (500 -> 375 potency), an upgrade to Hissatsu: Senei could be justified turning the line AOE into a frontal cone and reducing the potency by -50% for all further targets (400 potency, close to the original 375 AOE potency from Guren).