Your boy Rapt’s got you, bro.
Alright, so you’ve got six cloaking characters, right? You got…
Lazarus: The only non-support who can cloak, he can only cloak himself. Works very well with his kit.
Hank: Has a team cloak.
Bucket: Has a team cloak.
Cabot: Has a team cloak.
Sunny: Has a team cloak.
Kala: Has a team cloak.
Now, you’ve never played hunter, so I’ll explain to you a bit about how they work.
Lazarus can ONLY cloak himself. No one else around him gets cloaked. ONLY him. HOWEVER, the rest of the supports all have team cloaks, but they only cloak hunters in their immediate vicinity, including themselves. Firing a weapon/using a tool negates these cloaks for a short time for each of them. Lets say you’re fighting Bucket, and he cloaks. Every time he fires while in the cloak, he’s momentarily visible. However, even if he fires a weapon under the cloak, others around him stay cloaked.
Now, I’m assuming you’re somewhat new since you’ve never played hunter, so let me give you some advice for each monster.
Goliath: Flame breath is your best friend against cloak reliant teams. Your fire reveals cloaked hunters easily, making them a lot easier to kill. Meteor Goliath is even better.
Kraken: None of Kraken or Elder Kraken’s abilities are too good for finding cloaked hunters. However, when hit with a Lightning Blast, any hunter hit will have a teeny-tiny electrical aura zap thing around them. You really have to be looking to see it though.
Wraith: At S1 (and if you’re really looking, S2) you can see cloaked hunters with their little shimmery effect. This is because the Wraith is very small for a monster. It’s even easier to do when crouched. However, none of her abilities are really all that great for finding a cloaked hunter.
Behemoth: Lava Bomb and Tongue Grab are both good for finding cloaked hunters. Now, you may be thinking, “What? I get Lava Bomb because it ignites them, but how does Tongue Grab help?” Well, when you go into the TG aiming pose, anything you aim it at gets this weird bubbly thing around it, indicating that it’s capable of being snatched up. This also applies to cloaked hunters. Behemoth, like a crouched Wraith, is very low to the ground at S1, and, with minor difficulty, you ARE capable of seeing the shimmeriness of cloaked hunters.
Gorgon: Aside from Meteor Goliath, she’s probably the best anti-cloak monster. Any hunters that walk through your acid pools will be made visible to you, and any hunters that are coated in your webbing. If a hunter fires their weapon close to a Spider Trap while cloaked, it will nab them up. Although I don’t know if you can see cloaked hunters with Gorgon like you can with Wraith and Behe, I’d assume you’d be able to at S1, considering her small size and stature.
Whale, that’s all I’ve got. Best of luck to you!