The Vast Untime has a slowing CC that goes all the way up to 100% but requires 400% Power Strength. This build attempts to hit that threshold while still fitting the build into the polarity plan. We subsume Empower as it's the only option to get enough Strength for a full stop.

Grasp of [Lohk] is replaced as [Xata]'s Whisper will grant more DPS against most enemies and the the CC is useless as we're completely freezing enemies anyway. If you're doing extremely high level runs then replace [Xata]'s Whisper.

Strength is pumped to 400% by using most of the power strength mods and tweaking [Blind Rage] down a bit to save on mod capacity. We also need to use the Helminth ability Empower, the [Growing Power] aura, and [Energy Conversion] procs. You really have to juggle plates to get this gimmick running.

Range, Duration, and Efficiency aren't easy to buff when using a build that tries to hit 400% Strength. [Augur Message] can be swapped with [Narrow Minded] on small tilesets. If you're confident with your energy economy then [Streamline] is a flex mod. Same for [Primed Flow].

[Mobilize] allows you to bullet jump from farther away into a pack of enemies while casting The Vast Untime. It is a flex slot but with such low mod capacity to work with you're probably not going to find anything better to replace it.

[Rolling Guard] protects you during the initial encounter with enemies. If you're okay with waiting for your shield gate to recharge in between fights then replace it for more Duration or Range.

[Mobilize] is run to give you a decent boost to parkour movements and is one of the only mods that will fit into the build.

Arcane Strike allows you to dispatch the frozen enemies more quickly. It can be replaced by any other arcane to suit your playstyle.