how much nitrous will a stock magnum motor take

I'm putting a 4 stage digger on my motor and the gentleman that is helping me when I asked him said the following

For every 50 increase in nos pull out 2 degrees

Don't activate under 3500 rpm

If running multi stage then for the first stage of nos for every 50 hp of nos in the first stage pull out 50 then every 50 after the first stage pull 1

Anything over 100 shot run race gas for at least the fuel side of the nos system

Use a bottle warmer not a torch pricey yes but safe

No more then 1500 psi in a single bottle

Use as small of a bottle as possible to have maximum punch( don't know why that's wat he said)

That's wat he told me when we were discussing my motor I have never had nitrous before and now I'll have 4 stages lol

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I am no expert, but this seems all wrong to me. Other than the tip about not activating below 3500 and the bottle warmer, it pretty much goes against just about everything I've learned about nitrous.