Libra should be taken off the list due to the fact that Hasbro is only going to do the five layer system, unless there are people in Japan on this site.
Japanese sites are your friend... Also, Dark Bull should really be taken off that list. H145 does little but increase the recoil... SD is a top-tier part, but it also comes with Poison Serpent, which also comes with a new track and wheel.RE-FIXED1. Quetzalcoatl 90WF-Quetzalcoatl and 90 are both top-tier parts2. Libra (forget the track and bottom...)-Libra is a top-tier wheel3. Storm Pegasis 105RF- RF a top-tier attack bottom, and in almost every attack custom. Storm is also a useful wheel.4. Flame Sagittario C145S- Sharp is pretty useless, but Flame is a great Stamina wheel, and C145 is used in the top-tier Libra C145WB custom, and great for defense5. Virgo (Again, forgot the track & bottom)- top-tier stamina wheel, if you get the "good mold" that spins for a longer time6. Earth Aquila/Virgo 145WD/GB145BS- Earth is a top-tier defense or stamina wheel, depending on what mold you get. GB145 is a defense track that has yet to be tested extensively, and WD is a great choice for stamina in the absence of SD.7. Rock Leone 145WB- Mainly for WB, a top-tier defense bottom8. Lightning L Drago 100HF- Lightning is a pretty good wheel for smash attack (in upper mode)9. Dark Cancer CH120SF- Dark and SF are relatively useless, but CH120 is the best track to use with Lightning, along with the RF bottom.And don't forget... METAL FACES. These things have a use in ALL top tier Defense combos, and several Attack ones like MF Lightning L Drago CH120RF.