Inferno of Dust Storm, Eugene
As the vanguard, this unit is also regarded as "Heavy Artillery of Dust Storm, Eugene", so you can activate Persona Ride when riding from either unit! By resting two rear-guards, choose a column, and retire all of your opponent's rear-guards in that column!
When this unit attacks, by Counter-Blasting 1 and Soul-Blasting 1, look at the top five cards of your deck, choose up to two grade 3 or less cards from among them, call them to rear-guard circles in the same column, and this unit gets Power+5000!

If your opponent's vanguard is grade 3 or greater and your opponent has three or more open rear-guard circles, all of the units called by this ability get Power +5000!
Not only can you retire up to a maximum of two of your opponent's rear-guards, you can also call allies and attack immediately, increasing the number of attacks in one turn!

Resplendent Bullet of Dust Storm, Lugnit
If you have a grade 3 or greater "Eugene" vanguard, by Soul-Blasting 1 & resting this unit, choose one of your opponent's rear-guards, and retire it!
At the beginning of your battle phase, if your opponent has one or less rear-guards, stand this unit, and it gets Power +5000!
A precious unit that can be used as cost for Eugene's ability and is easy to play as well, thanks to its comparatively cheap cost for retiring your opponent's rear-guards!
With the "Dust Storm" tag included in the card name, it will be easy to add this card to hand with the ability of "Colored Strike of Dust Storm, Colorass"!