Firstly, in order for Danny to interact with them, he needs to create a tangible body which can be touched by physical means so they can touch him and affect his body (just won't cause him real pain), and while he can turn this body intangible to avoid attacks, he doesn't spam this as he prefers multiple methods of avoiding attacks. As for possession, the victory condition is knock out so all he can do with it is take one of them over and use their body to fight but Danny doesn't use possession to fight through other people when he himself is still capable of combat.
Once again for the many times I've made a Danny Phantom vs match against an opponent who couldn't bypass his regeneration, you guys do know that once he runs out of energy, he changes back into his human form and passes out right!?... it's was one of the win factors for many of his opponents in the past, you don't need to bypass Danny's regeneration to take him down. A perfect example is the Danny vs Will match I made where i explained how she could beat Danny despite his physiology.
Team RWBY still has zero answer whatsoever to his intangibility which he has passively against humans, and despite only being an 8A, RWBY Aura works as a health bar, so Danny can chip away at them for hours on end with his energy blasts until they're crippled.
Danny's true form is passively intangible against humans and it applies to him as well as he can't interact with them unless he makes a tangible body. Danny isn't lasting hours blasting them repeatedly given they can simply dodge the beams (unless he plays it tricky), it would just be a waste energy unless you assume they'd just stand there?
Empathy Manipulation? You mean his possession? That can only be used on a single one of them and Danny doesn't screw with people's mind in character like that in combat, he'd most likely use one of them to attack the other but given he still can't fight as good as they can, he'd more than likely not waste the effort and use his own abilities. Also, Danny can't fight for days... sure his stamina has gotten better since the first episode but all we know is he's likely comparable to his sister, who remained active for most of the day hunting ghosts, and Danny himself has spent his nights (not days) catching ghosts. So at most, he can go for hours before he starts feeling real energy lose (and that's if he's not spaming his powers).
If he just stood their they'd be able to touch him while he's tangible (they just wouldn't cause him pain), unless your suggesting he'll revert back to his abstract state and stay like that but then nobody can touch anybody and Team RWBY would eventually win since he has lower stamina than them so would turn back and I don't see the wasting that much energy unless they stupid enough to continually launch their attacks. Danny's style doesn't revolve around remaining intangible, he's overconfident and doesn't always pay attention, he wouldn't hold his intangibility for his body either since while that power is active, it will waste his energy, he's always activated it, let an attack pass through him or does something like phase through objects then deactivates it.
1. He can still attack them through firing beams and stuff, yeah. Sure, it's not in character but it'll be made pretty clear to Danny that he's not really gonna do much with his physicals. Any attack that hits him will 1 shot him, but then he'll regen with new knowledge that he can't really do much besides hax or range camping. Not to mention Danny's stamina is indeed enough to last hours, since that's what his page states
And they can dodge the beams (the only hard time they'd have dodging would be if the attack came from right underneath them if he attacks from underground). Yes I know he can go for hours, but that's through normal fighting, not spamming energy beams.
While Danny has convinced his enemies to fight with him, it's not something he has consistently done (he doesn't even try despite him previously doing so). As for possession, sure it would likely come up and helps.
Sure, but I'd say it wouldn't be immediate new strategy given how we see him approch his enemies on a regular.
1. Are you sure his stamina isn't applied to his beams as well?
1. They won't cause massive stamina drain but he'd still be expelling lots of energy so while I wouldn't say he'd burn himself out in minutes, he wouldn't be able to do it for hours non stop as it's still him applying more effort than just standard punches (unless he starts shooting weaker beams).
