When using a Machining deck, this card is the best unit to use as your starting Vanguard. That is because, after you ride during your first turn, you will be able to gain the +3k every time you call a Machining unit (as this card will always be in your soul after you ride.) this makes an easy choice to use when you don't want to use a Giraffa deck.
When you use Machining Stag Beetle effect, you can choose to [Stand] one of the units that you called to the field, thus giving you extra attack/boost.
Call two of this unit with Stag Beetle to get two free [Stand]ing rear-guard.