So what would you use to achieve this? Regular SVS prime sats or elevations??
Yes. Or, depending on the space you have available and how deep you pockets are, you could go with the full size bookshelf/standmount. Likewise, some use Towers at Surround and Rear.
SVS Speakers are designed to be voice matched even between Ultra and Prime. So if you want Ultra Bookshelf at Surround, go for it. Prime Bookshelf would be good, too.
To your earlier question: I agree with Shady. Some companies make Bipole and Dipole Speakers that will radiate sound in 2-3 different directions, and for Dipole, may come with a switch that changes the phase of the opposing drivers. The only time I have seen these recommended is if they are being placed in a very nearfield scenario where having direct radiating Monopole Speakers 1' from your ear may be distracting... so these Bipole designs soften the impact by aiming the wid-woofers off to the sides usually to soften the direct radiating effect.
But these are really not a great design and can muddy the soundfield.