Delta registeel nature and evs

i am thinking to take registeel the problem is a dont know what nature i should use

moves will be : fire move recover toxic and will-O-wisp

item : leftowers

now i have two ideas :

calm hp 252 def 100 spdef 152 so he is able to take less than 50% damage from mega alakazam and 51% damage from life orb latios. he is even able to take good physical damage and earthquakes.and can burn physical attackers but ground physical attakers are a problem.

the second idea is bold hp 252 def 252

so he takes 63 % from adamant garchomp,can burn after that he takes 31 % damage and can use recover. he takes 68 % damage before burn and 34 % after burn from adamant landorus T.

problem : he does not take special attacks so good.

what do you think ?

The ideal set depends on your team. For example, if you have a Chansey or Delta Regice, you can use that for special attacks and just go full physical defense. Stealth Rock is a good option over Toxic or Will-o-Wisp because with it’s ability it can stack with normal Stealth Rock for extra chip.

registeel should be annoying using will-o-wisp/ toxic surviving with recover and stalling. he should stay on the field as long as possible.anyway i will follow your idea and if i will change idea i can do somerhing like this : bold hp252 spdef 252. now i am going to use a bold nature with 252 def i will replace toxic with stealth rock will-o-wisp is too important. thank you for answer.