Another thing. Raigeko13 pointed out that ZGRB2 is likely a much better choice than ZGRB1, and personally I feel ZGRB3 is probably better still, depending what you need - unlike RB1/2, SonoKong haven't released the prize bey from it (yet?).
I think we should also consider pre-determined RB beys, seeing as those are pretty common now on ebay and are sometimes a more economical way to get certain parts.
There are of course other beys with parts that are almost must-haves, like those with EWD etc, seeing as we have beys on here where the only good part is the chrome wheel (gryph eg) those should probably be included too... Heck, Hell Kerbecs is still relevant for BD145 (though there are the RB7 releases and Hasbro's Befall The Ripper double set too).
I'd also question Shinobi Saramanda, between the Attack/Balance set and Samurai Saramanda E230ES it seems like a pretty inefficient way to get the wheel, and I'm still unconvinced Saramanda is really a must-have by any means anyway. Even if it is decent at most things, other chrome wheels seem to be the choice when non-twin right spin synchromes are used (Killerken, Ifraid etc), so unless somehow there is no other clear wheel that doesn't suck at anything in particular, I don't think it's something people should actively be trying to obtain.
Oh and in addition to what KainHighwind said, the stamina/defense set has Killerken too
I think we should also consider pre-determined RB beys, seeing as those are pretty common now on ebay and are sometimes a more economical way to get certain parts.
There are of course other beys with parts that are almost must-haves, like those with EWD etc, seeing as we have beys on here where the only good part is the chrome wheel (gryph eg) those should probably be included too... Heck, Hell Kerbecs is still relevant for BD145 (though there are the RB7 releases and Hasbro's Befall The Ripper double set too).
I'd also question Shinobi Saramanda, between the Attack/Balance set and Samurai Saramanda E230ES it seems like a pretty inefficient way to get the wheel, and I'm still unconvinced Saramanda is really a must-have by any means anyway. Even if it is decent at most things, other chrome wheels seem to be the choice when non-twin right spin synchromes are used (Killerken, Ifraid etc), so unless somehow there is no other clear wheel that doesn't suck at anything in particular, I don't think it's something people should actively be trying to obtain.
Oh and in addition to what KainHighwind said, the stamina/defense set has Killerken too