Legends Continuity, rank them from the most skilled at lightsaber dueling to the least. For characters that come from Games (Galen Marek, Kyle Katarn, Bastila Shan) only their LORE accurate versions should be taken into account.
• Upon entering the Halo universe, the Space Marine immediately knows they either have to save Reach, or help at least 3 members of Noble team survive to the Lone Wolf mission to get back to the Imperium. Upon completing either mission they will wake up in their Legion’s homeworld.
• All necessary knowledge of the UNSC/ONI, their personnel, the Spartans and the Covenant are also immediately downloaded into their brains.
• The Space Marine has most of their typical weapons & Armor: Bolter, Bolt Pistol, Meltagun, Flamer, Chainsword, Power Sword, Thunder Hammer, Jump packs etc. They have enough ammo to last the entire invasion/glassing of Reach and the UNSC magically has the tools to maintain Space Marine Armor/equipment.
Round 1: Noble 6 is replaced by a generic Space Marine from any loyalist chapter/Legion you want
Round 2: Noble 6 is replaced by Adrax Agatone
Round 3: Noble 6 is replaced by Demetrian Titus
Round 4: Noble 6 is replaced by Logan Grimnar
Round 5: Noble 6 is replaced by Tyberos the Red Wake
Round 6: All Spartans on Reach are replaced by 1 Robute Guilliman
BONUS ROUND: Replace 1 Spartan from every squad on Reach with a named Space Marine of your choice, add Robute Guiliman as a UNSC General to give orders, and a Sector Battlefleet of Imperium ships (about 75 combat ready ships). How much can the Imperium help the UNSC?