It is illogical to let light focuses compete against stasis in the crucible, because stasis is superior to light, at least that is what the story suggested to us.
It would make much more sense to let the player decide whether to play with stasis or against stasis. Therefore I recommend that there should be 2 Crucible variants, one with light and one with darkness. And no more mix of light against darkness.
That means, if I choose the light focus crucible mode, I can't select a stasis focus, it would be locked for all players. And i can play light vs. light in PvP.
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Or you know... they can do what in competitive game design in other game is known as 'balancing'.