As I understand it, the more procs you add only give you an increased chance of getting the one proc that the game will count. I don't know if that has changed since I last looked.
This applies to auto powers and auras. Attacks are a bit different.
No matter if I use the zip file or the installer, I get a
NullReferenceException
Error: Object reference not set to an instance of an object.
at mrbBase.ConfigDataSpecial.Initialize(ISerialize serializer)
at Mids_Reborn.Forms.frmMain..ctor()
at Mids.Reborn.Program.Main()
when I try to launch it.
My problem with inv is that it doesn't get that aggro aura until 26. It also doesn't get its status protection aura until 16 while most other sets get it at 10.
The problem is that some sets like fire are not designed to just stand there. Fire would need its heal to go off regularly. Dark would need its -acc debuff to go off regularly and so on.