getting SS in Public Assembly, No Mercy mode is easy IMO.. However, getting that score at other map is a challenge...
Public Assembly :
Collect all the easy to collect time bonus, after that make way into the bus in the center and camp. in the bus, executioner will not enter. Therefore it's easy to kill the rest with MP5.. majinis just drop ammos infront of u. Ammo whore, tonnes of ammo!
The mines:
The reaper lurked around from time to time.. sometimes instant kill when too near them. i hate them the most.
Village:
special majini which have very little place to inflict dmg on them. Some booby traps, booby traps instant kill any majinis. Majinis carry wooden shield

Ancient Ruins :
same as village, minus booby traps + fire majinis + Jumping Majinis.
Experimental Facility:
great map, narrow corridor, no special majinis but have tonnes of licker. Majinis tend to wear bullet proof armor which is a pain. Stun Gun is a pain
Missile Area:
not easy, as the map is confusing, at least for me. gattling gun majinis may come in pairs. Stun Gun is a pain
Ship Deck:
not easy, as the map is confusing, 7 chain saw majinis will spawn in the entire map in this order : 1,2,1,1,2 . after u kill 7 , no more will spawn. Problem is to kill 7 of it.
Prison:
Red Executioner. Run if u see it. Unless it's behind faces u, its weak spot. confusing map too..
I was wrong. GL does not spawn on certain maps.
How do i do the third combo hit ?wah, nice sharing. thanks bro.
about the combo, shoot the majini on the arm to start combo.
then use melee attack followed by your partner's then do another melee.
i think so...
accidentally done it once.