I feel like since Stasis Turrets, and Solar and especially Arc 3.0 Blinding GLs have almost become somewhat "powercrept" in GMs with the amount of killing power things like double Fusion grenades and Storm grenades (RIP but hey they still do put work in). I didn't start doing GMs under Beyond Light but the absolute META (maybe not for every single Strike but in general) was having at least one person running a Blinding GL to deal with annoying enemies like Wizards, charging Shield Knights, and even rank-and-file ads. Back then abilities did not have the same raw potential for one-shotting enemies and even a room with rank-and-file ads could completely annihilate your team if you got too many on you at once.

This season with Weak & Clear and Unstop GL it just elevates them even higher! This week with Scarlet being the Strike the Solar Wizards are essentially dead in the water when you pop them with a Blind. The final boss room becomes significantly easier too if you're camping behind a pillar and the ads/Knights funnel their way to you - easy pop of a Blind to stop them in their tracks for much easier kills. Don't always have to shoot for direct impact as well - (PC) click and hold after shooting and release when its close to your target (its a pretty generous radius for the Blind).

Anyways I just thought of this answering another thread about finding a Blinding GL and suggesting some builds for some other GM threads. For any newer players you can farming Dares of Eternity for Pardon Our Dust - has some nice perks like Autoloading Holster, Vorpal Weapon, Demolitionist, etc.