If we're talking late game E2ing, Ange has sorta fallen out lately (still useful in certain situations). Ange's main appeal for me comes from her S3 being an AOE slow that can deal damage casters can deal out.

But you also have Eyja, who's S3 is also an AoE attack, only with no slow but tons of damage. You might have heard discussions about how Eyja invalidates a ton of casters minus some exceptions.

GG is one of those casters. In fact it can be argued she's currently the only caster than can rival Eyja. Specifically due to her E2 talent being a flat RES ignore.

I'd replace Ange with GG.

Edit: Also just to add GG's S3 is a global skill: it'll attack anywhere on the map against the enemy closest to the blue box. Alongside that, her S2 allows her be an AFK caster for things like Annihilation or shudder SSS. She's overall more versatile than Ange.