Attack Ring: Penta Wing
Five-sided AR with relatively aggressive design, slopes facing each direction.
Notable for being the only AR that lines up with Star Attack in any reasonable way.
Lack of range, obstruction and inward angle of contact points results in unimpressive Smash Attack
Too much recoil for Defensive or Stamina use
Penta Wing's Upper Attack in this direction is largely limited to destabilization, thus not worth using.
Solid Upper Attack in this direction due to the reasonably long slopes on each wing.
Moderate but not excessive recoil.
These attributes make Penta Wing a viable, if very offense-focussed Attack Ring for Spin-Stealing Attack. Its recoil does cause it to lose match-ups, particularly same-spin, where Upper Dragoon might win by outspin, but the increased offensive ability makes it reliable in other match ups.
Slopes make it effective as a Left Spin Traditional Upper Attack AR, and it is a very compelling choice for this - which also makes Star Attack a viable competitive part just for this reason.
Overall while there are many alternatives, Penta Wing is quite unique and effective.