I need help in halo 3 highest skill?

[Travis Johnson]

what is the best ranked game mode to get your highest skill up
my rank is captain grade 3 and my gt is partiinmypants

 

[Johnathen]

team death mach for sure

 

[Alex]

doubles is the easiest way to rank up if you have a good partner with strategy... lone wolves is the next best thing but if you're only a captain you could easily get up by yourself in slayer or swat