From what I understand, Superboy Prime, being modelled on PRE-Crisis on Infinite Earth Kryptonians, gains no actual advantage from journeying to, or even immersing himself in, our sun. Rather there's a more or less set maximum that he is automatically "set" to once yellow sunlight reaches a certain threshhold. Exposure to the sun itself was actually regarded as a trial that Kryptonians were able to easily ENDURE thanks to their metahuman invulnerability, not something that actually BOOSTED them beyond their "normal" superpowered selves ...
Not true. Prime is not a PC Kryptonian (for example he's 100% immune to magic and they aren't), and he's far more dependent on yellow sun than they were. He gets more powerful with just his finger touching a beam of sunlight.
Depends on how fast he can take them out one at a time.But each one would get more powerful after one drops out.How will he fare once he reaches the last one? He has to take them all out at once.
SBP takes this, he is too powerful for them, thor gave emma a good fight, rulk and thing were owning namor for a while, gladiator was overpowering colossus, the phoenix 5 are nothing for prime he will tear off limbs, shove heads up asses, the phoenix 5 will die in a brutal way.
breaking her to pieces can be considered a ko, also even after she reform and Prime realise that he can simply bfr her into another dimension or what ever, i am sure his heat vision is powerful enough to not only melt her but completely destroy her to the molecular levels to the point nothing is left to reform from.
to be completely fair i am not sure if Prime's sun amp works same way as superman as far as the duration time, i know a single ray of sun empowers him completely, however as far as the longer he stays the stronger he gets thing was never proved, anyway he doesnt need to be stronger than normally to own them, as i said before thor gave emma a good fight, rulk and thing were owning namor for a while, gladiator overpowered colossus, it is very clear that Prime on averege will dominate and stomp this entire team they are nothing special to him.
She showed pretty much she could reform at will. Don't think smashing her would count as a KO. Also, phoenix/fire/star? Y'know? Don't think heat vision would really be the winning edge here. As for BFR, I don't really remember reading BFR as one of SBP's go-too tactic or ability...