The Best objective is...

the best objective is artifact recovery, because only cool kids know how to make it happen in the first place

Wanted to vote Escort because that's okay usually, but then I chose Pizza because it's the most fun to troll around (and being trolled) when playing with BSNers, so yeah, Pizza Wars

Depends.On some maps pizza and escorts on some maps they can be pain.Safest objective on every map is a hack.If you can glitch it of course.

^^This is common sense as such the best option. Pizza on Rio or Ghost? Gimme a break.

Pizza makes me loudly tap-tap-tap the spacebar, which in turn makes my wife mad, especially after midnight... Target elimination FTW.

Glitched upload. Only THE COOLEST kids know how to do it. And when you do it, you don't have to do anything else. No running with a pizza, no standing next to a drone, no nothing. Ultimate glitch and forget technology

Screw pizza, honestly. The thing made me replace my laptop keyboard because pressing both W and fiercely tapping Space keys led to the former popping off due to fubared keycap retainer. Luckily, it was all warranty-covered, so it didn't affect anything, but now I'm using a separate BT keyboard which I place on top of the built-in one. And Di-Crash always beats me to the punch in pizza wars. If you're reading this, YOU'RE A BIG FUCKING ROBOT! YOU DO NOT EAT PIZZA, FFS!
Same goes to escort, because the speed highly depends on pugs' cooperation, and they fail to do so more often that I'd like. Also it can be quite painful for squishies on maps like Ghost Hazard or Rio - for instance, yesterday during a Gold FB Ghost (H) game, I dropped only once in previous 9 waves and about 10 times during that escort on W10 on my Huntress.
Hacks can be really bad as well, because if you're a squish trying to hide behind low cover, and there is some immovable object standing right behind you and catching all that Ravager fire with its face, you'll drop. And there is always someone who'll blow that Possessed a-bomb up instead of letting it grab them - boom, at least 2 frags. Juggies squeezing the hell out of said a-bombs are especially fun.
Devices are a PITA as they are. It's a known fact. Pugs can make them 10 times worse though.
Targets can be bad, good, or fun. Really bad when you're soloing and have no missiles left; good when otherwise, or you're not alone, damn funny when you're playing in a group of Tryhard McScorewhores - big badaboom and missiles flying everywhere. Me? Damn missiles cost money, so I'll just grab my popcorn and watch, thank you.

So yeah, aerial bombardment all the way.

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I THOUGHT YOU WERE GOING TO TELL ME THE ANSWER

Escort. True team objective. Hack is second for same reason.

Devices are the most difficult on most maps.

Targets is stupid. There are no high profile targets in MP, they are all just the same mooks.

Artifact is interesting, wish I saw it more.

Aerial bombardment is for the weak.

Device objectives are probably the #1 reason I like playing infiltrators. I just always spec TC for duration now so I can easily do devices regardless of how badly my team is doing.