Ignore that. He is completely missing everything figured out this very year. The premise of modern Spelladin is completely different to simply "stacking spellpower".
https://www.youtube.com/watch?v=TaZKFYEI9m0
A general video recap on it.
https://www.youtube.com/channel/UCGG...rXcv3Xqbk6fZug
The guy mainly responsible for getting it together.
Spelladin relies on using Manual Crowd Pummelers because the Seal of Righteosness damage remains static based off the MCP's original speed despite the attack speed use function. This has been proven true in the Classic beta:
https://streamable.com/bi3xa
Pro is that you don't conflict for gear nearly as much, and can do rather good damage. Con is that you have to get a lot of consumables and farm MCPs to hell, so it's definitely a niche playstyle.