As long as he has the phoenix blessing and his Reid sword which protects him from even god powers, attacks like hakai should not finish him for good, nor would it affect him. And Vegeta's hakai is still in question, i dont even know why this attack is even considered. He just started to train it.
As for Rein, If he dies, he will come back ready and full powered. Unless Vegeta can fight forever, i dont think he would outlast Rein.
And the very said gods in the DB universe can be defeated and when u translate tht to rezero world, like i provided the comparison, what is stopping them ?
The way I see it,
Rezero world Authority>Blessings>everything else
DB world Zeno>angels>gods of destruction>supreme kais>Grand kai>Normal kais
Now, if we were to straight up compare there, u know where the blessings and authority would end. It is very simple tht while all the advantages of rezero world r being given to reinhard, but at same time, DB characters are being denied everything. They can fight gods & angels themselves, but here they can't fight the blessing or authority, the contemporary in re zero world.
Then there is sheer magnitude which even jammin indicated tht Lambu claims rezero world = Universe and he rewrote world = universe ? Really now ?
Where r the lines the sun flickered, it turned black, the universe and other planets started rumbling themselves etc etc etc. DB world portrays it. They have to at least say a line abt it.
Even in Naruto, it was said juubi can destroy world...did it mean whole universe ? No
So, when u bring 2 verses, all efforts r done on alleviating reinhard to universal level which he is not , while DB characters are there.
My question was simple. What stops vegeta from blasting sun itself and destroy od laguna itself and stop the resurrection cycle itself?
Tht brings me to blessing of phoenix - clearly states
'As long as there is someone's voice asking for help in the world, even if you defeat me, the second and third servants will appear.
" `, meaning post death, he is still needed by the world for sake of someone else.
And 2- World keeps on bringing him back because it needs him.
Inference - world is bringing him back for sake of someone else.
Now lambu's claim
1-It was a joke
2-then he turned it into he is saying tht for himself
No, now reenact this scenario as per lambu's explanation , there r only 2 characters in the world ....Reinhard dies, he calls himself back as he needs him back, meaning when he is soul he is
hearing his own voices, and world is bringing him back for sake of his own self .....how does tht even make sense ?
Soul which shld exist in complete different plane is calling its own self for help...so who is actually hearing it - od laguna ?
but explanation states world needed him is why he is brought back, if there r no people in the world, for what reason would od laguna bring it back ?
Tht statement clearly states, tht someone needs help and he hears their voice is why he is brought back. How would one call themselves....is he having split personalities now ?
See, it is very clear like i said yesterday, it relies on someone asking for help (whose voices he hears) is why he is being brought back, means it is a requisite here , a 3rd party interference. My question is simple - Why would vegeta wish for his help ? And if noone wants his help....u know rest.
Also other point, vegeta's hakai. It was not a matter of magnitude, but the claims tht as he is immortal , hakai shld not work on him which is wrong because this is ressurection and conditional immortality.
My point is rather simple here
1-If u really wanna make verses battle, u have to bring them to table giving both of them advantages
Reality here - Saiyans can fight Gods and angels too, but here, they can't fight divine blessings which r supposed to be their contemporaries.
2-World here - the earth = Universe for rezero, when clearly it has stated no clear effect to anything outside solar system
But DB world - the clashes of beerus and goku was felt as shockwaves in completely different worlds, galaxies away.
Reality here - Buff reinhard to universal level when no indication at all for effects even at jupiter much less the other galaxy , but nerf saiyans.
Sorry, but the way it has been presented in this thread , it is just double standards completely.

If u r gonna nerf the destroyer who could destroy a solar system+ in SSJ2, u have to give him further advantage in other aspects..it just cannot be one sided completely.
Anyways, meh, i m bored kinda.
but as for ur question yesterday, i have tried giving source and explanation in posts. I am not rejecting the od laguna, but saying the requisite here for phoenix doesn't fit the tournament as it is established - since reliance on 3rd party.
As for talking to himself and calling out to himself for help as soul from other plane , it really just doesn't make sense at all when clearly it says.....someone. Why would u call urself out for ur own help as souls ?