Greetings!
I've modified an existing SoloCraft script that was no longer working and made it functional. It can now be found here:
https://github.com/GnaXi/TrinityCore/blob/Solocraft/src/server/scripts/Custom/Solocraft.cpp
However, this script is heavily favoring melee, as it doesn't modify Spell Power.
I've been looking into using ApplySpellPowerBonus for that, but I am simply not skilled enough to perform what is needed to make it work.
If anyone is interested in completing the script, I would gladly pay 50$ via PayPal or in Bitcoin, whichever you prefer! :)