Rules Deep Dive - Who goes first?

Alright this is probably my last insight from building a battle simulator for today - it's a deep dive on who goes first. I didn't go through the https://peakmonsters.com/battlechain to prove this one out, I'm pretty confident Bulldog got it right

Question is, who goes first?

1. Speed
2. Attack Type (Magic > Range > Melee)
3. Card Rarity
4. Card Level
5. Random

Happy battling!