While a potential draw engine isnt terrible on your commander, Raff, Weatherlight Stalwarts tapping requirement costs you blockers
Best Storm Commander Payoffs and Enablers Well, lets get the obvious out of the way
Akiri, Line-Slinger I know cEDH players often play 2-color partners just for the colors, but Im not sure why youd ever play Akiri, Line-Slinger over Bruse Tarl
Especially with an increase in 3 color decks getting played, the targets you have seem to have reduced significantly over the years
Six mana can be a lot, but red has no shortage of rituals or Treasure tokens to get this out early, and while you cant cascade from copies of spells, you can discover if you cast cards like Trumpeting Carnosaur or Hit the Mother Lode, which then gives you more copies
Whether or not you play the card is likely dependent on the type of environment youre in