Sig attack group

This may be a dumb question, but I'll ask it anyway. Is there a place where people can ask for help or give help coming up with Sig attacks and/or their actual effects?

It's called the "Signature attack help thread", and it's pinned at the top of the General La-De-Da forum.

So, I could post my idea for a sig attack, and they could help me with it? Or I could help with the damage their sig attacks do? Etc.

Both. People post their ideas for sigattacks, and anyone else can comment/make suggestions.

If you want to help with someone else's suggestion, just make sure that they know they're talking to you.
If you're looking for advice on your sig, just post the specifics and ask for help.

Thank you for your help.