I understand what your saying, but when you create a profile for watt tool on the website, it lists gpu 0-6 regardless of how many you have. Right now I have 6 in 1 rig and 4 in another, but it doesn't tell you which rigs gpu's your working on. how can I tell which rig's gpu's i'm modifying?
You need to select here:

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WORKING SOLO SIA MINING WITH MINERSTAT!!sgminer-gm AMD
DOWNLOAD THIS FROM GITHUB:
https://github.com/coinscrow/minerstat-windows/releases/tag/sgminerReplace your sgminer-gm folder at clients/sgminer-gm
EDIT start.bat replace your address ...
minerstat config.txt to
MINER=sgminer-gm
Enjoy! 👍
For NVIDIA guys the CCMINER can be a good pick. Already in the package tpruvot
I'm currently mining Sia but its not fully supported with Minerstat yet. (stats are missing) Coinscrow says he will look at this a little later.
In the mean time can use this config if you'd like to mine Sia with NVIDIA:
ccminer-80-x64 -a sia -o
http://sia-us-east1.nanopool.org:9980 -u coinwalletaddress.worker -i 28 -b 0.0.0.0:3333 --api-bind 3333 --api-remote