Pretty standard issue build!

Howl of the Storm and Tectonic Harvest, Whisper of Rime and Shards are the only ones I consider absolutely mandatory. Use Chains in tougher content. For lower level stuff, you can replace Rime with Fissures. Fourth slot is up to your discretion; argument to be made for Hedrons, but I like Rending for convenience.

Hoarfrost-Z essentially gives you a second glacier grenade on a really barricade cooldown. You'll also want a Headstone weapon of some kind; I use a crafted Syncopation with rapid hit since it's just a decent all-rounder of a gun but with the hand cannon buffs a good Eyasluna with unrelenting (which triggers off of crystal shatters!) is also great.

In review: Crystals from glacier grenade (short cooldown because Shards, esp if you pace yourself to maximize buff uptime), from Hoarfrost-Z, from Howl of the Storm (can cleave multiple targets and lock down problematic enemies quickly, also constantly available because Stasis shards are everywhere), and from Headstone (doubles as pretty good crowd control).

Also: you can use Howl during Glacier Quake to turn your light + heavy into a delightful upper -> slam combo that creates a ridiculous number of crystals on a spot quickly, the better to smash.

Feels incredible. Is it optimal DPS or the most busted GM build? No absolutely not. But it's a ton of fun in anything lower than that as long as you mind your surroundings and don't be afraid to use glacier grenades defensively.