Is This Build For You

This build is an overall very expensive build, but thanks to shield gating it's also pretty dang good. if you want a strong support [Frost] with good globes and the ability to strip armor this build works out great. It does require an umbral forma to armor strip though so it is very costly and that can be seen as a downside.

Gameplay

Frosts main gameplay loop is pretty simple using this build;
•Hold a position with Snow Globe(3) , recast when necessary or once the invulnerability period on it runs out.
•Cast Avalanche(4) when enemies get into range to sunder their armor temporarily allowing you and teammates to quickly kill them. When [Growing Power] is active this will fully strip enemy armor.
•Cast Snow Globe(3) to push enemies away and restore shields due to [Augur Reach] allowing you to shieldgate with the small gain

Mod Alternatives

•[Umbral Vitality] can be swapped out for Umbral Fibre as this build doesn't really take damage as long as it's held up in a snow globe
•[Augur Reach] can also be taken out for [Stretch] if an ally is using [Brief Respite], or if you have an Augur set mod on any other equipped gear, or don't need to shield gate

Arcane Options

Your arcanes can be anything with this build

• Armor arcanes like Arcane Guardian for stronger globes
• Damage arcanes that don't require you to take damage like Arcane Rage
• I would avoid arcanes that require you to take damage (that aren't for survivability) and while Arcane Energize can be nice it's not really needed

Synergy

• if you equip Synth Fiber onto a companion it allows you to pick up health orbs for Health Conversion without needing to lose health
• Synth Deconstruct allows companions to generate health orbs for Health Conversion
• [Nekros] and [Protea] can generate health orbs for [Health Conversion]