Since this isnt cheif vs guardian its pretty interesting. Halo has: Spartans (of varying quality and number) Unsc (alot of unsc) Covenant Unsc friendly covenant And the halo rings which kill all living things so haha game over Flood (yaay mindless zombies) Promethians (vex that arent vex and dont have time travel. Scary) Destiny has: Guardians (and not many of them) The "bad" guys (who seem to have huge numbers and holdings far beyond whats seen in game) -Cabal (super soldiers! Alot of them.. like spartans from actual sparta) -Hive (lead by literal gods) -Vex (control time but dont use that to their advantage.. must be stupid) -Fallen (these guys are a joke) Oh and the darkness and light. Which may or may not be alive and therefor not subject to the halo rings So its a tough call, halos heros vs destiny's heros would see halo cone out on top for sure but if halos universe all teamed up to fight the collective destiny universe i think destiny would win for the fact that theres alot of lore indicating destiny's bad guys vastly outnumber halos universe