Ace Tonk Commander

Why do they make achievements like this? Solo there's not enough markers, and if there's too many people it's also impossible. So you need t o wait for the right number of people and then hope they don't shoot too many targets and let you get them all -.-

Well, after a whole lot of attempts, I finally beat this.

You have to have a combination of several things
1: No lag, not one bit
2: Luck, better have some well spaced targets
3: Lack of other players, 1 other player might be fine (Unless they are really good), but any more will get in the way
4: Practice

My guild leader wishes I put this much trial and error into raiding

But.... shiny toy...

Blizzard should learn valuable lessons and stop putting activities into WoW which require the game to behave like a dedicated, single-user arcade video game. Given the vagaries of internet connections, the varying number of fellow participants, the apparent lack of testing by Blizzard themselves, and many other factors which affect the performance of these games, taking part in them is a frustrating exercise in battling forces which are mostly random and not under the control of the player.

Of course you are going to get the boastful people who come onto the forums to say how "easy" these games are, and demonstrate what a "brilliant player" they are by showing off whichever pet, achievement or other reward they have been lucky enough to obtain. But my bet is that the vast majority of players will simply give up after trying these games, realising that they are a random and unfair challenge, and they will simply go off and do something else, but with a feeling of frustration, and of being let down by Blizzard.