Hi Guys,
Like the most of you (some earlier), I have been enjoying this amazing game since yesterday. As with past Halo games, certain enemies are best taken down with certain weapons or a combination of weapons. I just thought it would be helpful to know what weapons do you guys prefer to use for each particular enemy type.
Here is a list of the enemies, just add the weapon of your choice. 
Enemies:
Covenant:
Grunts-
Elites-
Hunters-
Jackals-
Promethean:
Knights-
Crawlers-
Watchers-
Enemies:
Covenant:
Grunts- PP
Elites- PP till shields down then Magnum
Hunters- Plasma Grenades
Jackals- PP
Promethean:
Knights- Scattershot
Crawlers- My Fist
Watchers- Any Long distance gun
Enemies:
Covenant:
Grunts- DMR/BR/Carbine/Magnum/Light Rifle.
Elites- Plasma Pistol burst-DMR/BR/Carbine/Magnum/Light Rifle to the head.
Hunters- Fuel Rod Gun/Rocket Launcher/1 hit in the back with Energy Sword.
Jackals- DMR/BR/Carbine/Magnum/Light Rifle to the hand then to the head.
Promethean:
Knights-Supressor/Assault Rifle to lower shields then DMR/BR/Magnum/Light Rifle to the head. Any Power Weapons such as scattershot/Binary Rifle/Incineration Cannon are always preferred at higher difficulties.
Crawlers- DMR/BR/Magnum/Light Rifle (always one headshot)
Watchers- DMR/Light Rifle. 4-6 shots.
Nice, to be honest the main purpose of the thread was to see what weapon people were using to kill Watchers. For some odd reason I seem to be having issues taking them down.