Well if you make it that you can't break any blocks (which would be ideal) there are a few choke points on the map actually. I also would suggest making water a instant death if possible? (to make it more like the actual game).
Also, some kit ideas for it:
HUMANS:
Knife-Only:
Iron sword
TNT
(Some kind of redstone trap to make TNT explode)
*Potion of Swiftness (or whatever makes you run faster) I the entire map*
[Would be akin to running combat knife, lightweight and claymore].
SMG:
Power II bow
120 arrows
Enderpearl
Blast prot II leather chest
*Potion of Swiftness (or whatever makes you run faster) II the entire map*
[Akin to running MP7, tactical insert, extreme conditioning and flak jacket]
HUNTERS:
Shotgun:
Sharp I iron sword
Leather leggings(?)
[Akin to running Remington shotgun and tactical mask (can change armor maybe? Not sure ideal match up with tact mask)]
Sniper:
Power III bow
30 arrows
Dispenser
Fire charge
Pressure plate
[Akin to running DSR-50 and bouncing betty]
Just ideas!