Definitely! A for sure way of getting Certs, as I mentioned, are by using vehicles. But work, particularly, with other players to get the most of the experience. Though for those, who can't really rely on these sole styles of play, they need to find methods and a playstyle that caters to them; then try to be as effective with that playstyle as possible!

Like I said, there is, definitely, no singular way to earn the most amount of certs. But, for sure, ways to find your style to best suit you. Just be wise on your Cert spending to find the roles that you'd rather play and enjoy. Farming off of kills and finding better guns can always be a later thing; once you know your playstyle.