Keep those Bombs Away! (From Me)

you zone into the instance inside of a boat, and as soon as you get onto the deck, the cannon fire begins. they are very obvious red circles, but it's happening a large amount of the time in the scenario. any time you are on the deck of a boat, there will be cannon fire to watch out for.

there are also bombs that goblin bosses throw out with different graphics. they don't count as cannon fire.

pets will not fail the achievement, so you can feel free to summon your pet and not worry about having to micromanage where it stands.

I just discovered a bug that lets you get this solo with even the worst pug. As long as you personally don't get hit, if you bail on the group during the last boss fight, you'll get the achievement when the group finishes the kill. Even though you are not even in the scenario. I've confirmed that this works for No Tank You (Don't get hit by the demolisher and bail on that fight) and my guess is that it also works for any scenarios that require the group to do something. E.g. You mean that wasn't a void zone and Save it for later.

Just FYI.

There is on the lower deck of the first Horde boat you assault (right under the stairs) a purple bowl which can be eaten buy one in your party.

This bowl will put on you a 5 minute debuff which will make all the cannons target only you in the entire scenario (anyway it needs better testing - like if it works when people is on different boats). You can use it multiple times refreshing the debuff.

Since only one will be targted by cannons, the achievement will be much easier to do - just be sure the guy who takes the bowl is good enough to handle it (the last boss part with that debuff is really hard; but doable if you completely ignore the boss and focus on moving only).

I have to try if staying on an already "freed" boat will make it easier.