Best Ammo?

lol. I still don`t know what BW wanted to do with Explosive Ammo.

I only used it with my Geth Juggernaut + Crusader kit. 

That small damage from explosive round was sometimes enough to finish off the enemy... lol

Otherwise, ME3MP had way superior ammos and there was no real reason to use Explosive. lol

I find stripping shield function just too important in this game personally. 

Mainly because the toughest enemies I face is in the end those shielded ones.. Annoint, Observer.. and Sharpshooters..
The faster I take them down the easier the game.. hehe

I agree, but I usually play tech-based characters, so I have no problem removing shields with powers. So I tend to have my weapon concentrate on armor/health (=> incendiary)
Also, my mind might have been troubled by playing more than 1000 hours of Warframe, so if I don't see explosions and particules every few seconds, I fall asleep 

But now that tech bursts are decent (compared to ME3) and that disruptor ammo isn't a nightmare for biotic squads anymore (again compared to ME3), if I played more biotics, I would choose disruptor too

Turian Sentinel -> Warp -> Incendiary -> Hurricane X 
could take down gold Brute in like 5 seconds. That was awesome. lol

YESSSSS to the return of the uberop explosive ammo!!11!!1!!!!!!1!!!!1

Cry Ammo:
Cry ammo is the best on the human engineer. Snap freeze for the win. Keeps elemental tech going.
Not sure how much armor debuff it has but Outlaw has a ton of armor so if it is in fact giving you extra damage vs armor it would be useful there.
Combos seem the slowest in terms of time to prime IMHO.
1.5 x damage vs armor combo multiplier.

Disruptor Ammo:
Disruptor is great in that you can prime and detonate shields and you get a little stun vs kett and observer shields melt fast.
The combos suck as tech combos are the weakest of the bunch.
These seem to prime the fasted, or at least faster than cryo IMO.
Tech combos 2.5x vs shields (but is that really even needed outside destroyers)?

Incendiary Ammo:
Little burn out but not much.
The combos are strong and offer 1.5x multipliers vs armor.
Faster and more consistent than cry combos IMO.
Don't work on shields.

Personally, due to the speed and armor multiplier and damage I feel that Incendiary is the best if you are detonating. My go to combo/priming ammo. If you aren't detonating then disruptor would probably be best for stun  (vs Kett and Remnant) and it smashes shielded enemies. Cryo for human engineer and if there is some armor debuff to cryo ammo then outlaw if you aren't detonating (seems too slow to me) as there are lots of armored targets....

So I honestly think this poll is bad. The ammo type you use depends on the character and faction. You probably also don't want cryo-ammo on a flamer build either or one person using cry and one using fire... You also have to factor in detonating or not because detonating objects often cancels DOT effects. 

I`ve seen enough people saying this to make me try it now. lol

My H.Engineer is at level 3... but I will get her done. 

Are biotic rounds still a thing?

Cryo by a country mile. Most debuff, most damage, most utility.

Hmm.. so shattering frozen enemy has some kind of effect.. I didn`t know.
I thought it had to be done through cryo combo.. but that`s good to know for sure.

For versatility, I think I'd say Disruptor.

But my only successful Gold game was largely accomplished on the strength of Incendiary ammo, so it's hard to say definitively.