Unfortunately, the only use I've been able to find for [Xaku], in their released state, has been to use their 4th ability to break boxes for argon and syndicate medallion farming. But for that niche use, [Xaku] has manged to unseat the former Box Breaker King, [Limbo].

The Vast Untine, [Xaku]'s 4th ability, can be modded for greater range (70m) than [Limbo]'s Cataclysm (45m) and like [Limbo]'s skill, the damage it does also goes through walls! It even gives you a slight speed boost you can use for gathering loot.

Lowered duration and maxed efficiency are used to help deal with the ridiculous energy costs of the skill (and my inability to remember to turn it off)

Just in case one of DE's reviews ends up turning [Xaku] into a more useful frame, I've left it unforma'd, to allow for future modding.