Save a few burn cards, to use after you prestige. You'll probably find you're not earning as many lately, as they're often rewards for challenges and you've completed a lot of the challenges for your favourite weapons.
After you prestige try to wait until you're level 7 (I think it's 7 - might be 6 or 8 though) before you use those burn cards. Won't take long to get there - you'll be level 7 after only 2 or 3 games.
I say wait until then because that's when challenges etc. become unlocked - and you'll find it easy to complete loads of challenges and win loads of xp if you have those cards available. In particular you might want to keep a couple of "Amped EVA8" shotgun cards handy, as that's the weapon most folk are using when they're generation 2 (as you need to get loads of kills with the shotgun if you want to prestige again). It's not the trickiest of requirements. I'd guess I'm less than half-way to the next prestige but I've already got all the shotgun kills I need, so I only need to get to level 50 now - and I can switch to the R101 carbine.
Haven't had the chance to play much this past week or so. Been one of those weeks.
I'm still mainly using the one pilot set up and one titan set up (though I'll sometimes switch to my alternative pilot for the first spawn of the match, giving me stim instead of cloak), and am mainly sticking to Hardpoint Domination.
I'm not happy with the update they made on Saturday, though. Amongst other changes, they've massively reduced the rewards for defending hardpoints. Now you get 25 points every 10 seconds or so, whereas it used to be 75 points. You're now better off not defending. Which is stupid, in a game mode that's supposed to be about capturing and holding defensive points. You're better off either dashing around to capture another hardpoint, or backing off a bit to allow the enemy to capture them, then retake them. That latter option is quite ridiculous, tbh. You also need to stand a bit closer to the terminal to defend it, on some maps - so if you're at the other side of the room keeping an eye on it you might not get defence points any more.
A full list of all the balance changes etc. can be seen
here