Need a few answers regarding Grinding

[Mageus]

Just have a few questions I would like to know the answers to in regards to grinding.

1. Is there any difference in the success rate if I am using Grinders that are of a higher rank then the weapon I am trying to grind (e.g. grinding a B-rank weapon and using Grinder S's)?

2. If there is a difference, then what is the difference (e.g. would say using a S+7 or S+8 to grind a C or B-Rank weapon be like using a +10 of that Grinder rank)?

3. Apart from your Photon Fortune and using +10 grinders, is there any other way to help incress the success rate for Grinding non S-Rank weapons (not counting event panal rewards)?

Thanks in advance for the answers and advice.

[Orochinagi]

I will try to keep this one simple for you. Answer 1, is no. Answer 2, no difference. Answer 3, no besides having multiples and trying to learn its grinding traits. I hope this helps. By the way, these forums have a search feature that allows you to find similar posts already answered most times. Your post is common and some of them have addtional details, debates and opinions inside.

[Kay Jay]

I believe three star luck also helps

[JCGamer]

when grinding best have 3star luck and work with S+9 & S+10
make sure have 3 to 4 wep of the same kind.so if 2nd wep break on you then ur lucky to get it on 3rd or 4th wep to 10/10 or close to 9/9. also is best you do it on the Grind boost.but sometime its rare to get at least to 9/9 but from getting a wep to 10/10 big risk taker just got to take.I have seen many psu player had a success rate made there wep at10/10 and some of them just piss all there money away ending there wep to 2/2 and 4/4 worse grind they ever did.only I have to say is just be careful when doing so