So many deathclaws... How do I make them stop?

As an additional note, radio rooms aren't all too reliable for getting dwellers. The introduction of a radio room adds the possibility of raider attacks and deathclaw attack as drawbacks. So if you really want to remove the possibility of those attacks, remove the radio room.

Deathclaws won't show up if you have less than 60 dwellers in your Vault (60 exactly may also be okay). So, aside from never opening your Vault door and never using the Radio, one possibility is to send of your less productive dwellers out into the wilderness and let them die (or just remove some of the dwellers killed in Deathclaw attacks) until your total population is 60 or less.

It's worth noting that rooms you've unlocked stay unlocked even if your population takes a dip, so if you are careful and callous, you can raise 40 dwellers (assuing you are already at 60) and then as soon as you have 40 kids, start sending the "Doomed" generation out into the wastes to die. You'll get a lot a Deathclaw attacks, especially opening the vault door a mess of times, but eventually you'll be safe again, with all the rooms unlocked.

I have found that if you cause an incident by rushing a room right as you open the vault door to let someone in, deathclaws do not follow afterwards. This has worked the 3 times I've tried it. Rats are much easier to kill than deathclaws. Best of luck.

You should know that equiping the dwellers on the first, second and third floor with the best weapons and outfits won't always work. They have to be of high level and also, I would suggest you to train these abilities: strenght, perception, endurance and agility, so that all those dwellers I've been talking about would have those stats maximized. At the moment, my vault has 80 dwellers because I nearly lost everything after one week of playing and now I'm taking it slow but safe. Also, I have no dwellers waiting on the first floor(I have a bedroom and a storage room there) but still, the deathclaws die either on the second floor or in the first room on the third floor. Hope this helps! If you do as I said, you'll see that deathclaws will be easier to kill than molerats which are purely annoying.. Also, to fast level up your dwellers, you could try sending them into the Wasteland with some stimpacks ofc, they achieve XP faster there.

Train in endurance BEFORE leveling. ((HP only grows while leveling and is based on END) Training END after leveling doesn't boost HP at all, only radiation resistance.) Wear endurance suits until fully leveled, and send people out into the wasteland to level quickly (with a full supply of 25 Stimpacks), Radaways are less important, because at over 10 Endurance, their explorer journal will occasionally say "took 0 points of radiation damage." (you can give them a few to be safe, but radaway doesn't really matter, save it for water shortages(which might happen if most or all of your water pumpers are temporarily out in the wastes leveling up).

Aside from that, once someone's at level 50, put them in good clothes, and arm them well. That part will be easy, because with all the exploring you've just done for the leveling, you'll also have a good stash of special armor and weapons.

After that, Deathclaws (and those dreaded molerats) will be a minor issue. As for raiders and roaches, they'll pretty much melt away like butter in the microwave.

=D

Deathclaws do appear before you have 60 dwellers, just only in hard mode. If you train all of your Charisma dwellers with maxed out Luck and place them in the Radio Room, that will stop the Deathclaws. Yes, it's true. Max Charisma and Max Luck (you can train them up to 10 and then put outfits on them and that will increase their stats even more). You cannot "turn off" the Radio Room, even if there aren't dwellers in it you still have a slight chance of being attacked by Deathclaws (surprised me too).

For me I keep getting attacked by raiders. But, I would suggest not using a radio station because every time a waste lander is successfully called, there is a very high possibility that they were being followed or chased by deathclaws. Send people to explore the wasteland with tons of stimpaks and rad-aways, and expand your vault from the inside by having your dwellers have kids but make sure you can keep up with resources. Then when your dweller returns, it's likely you'll get attacked by raiders rather than deathclaws. And train your dwellers and assign your strongest toward the top. Every time the vault door is opened, it increases the chance of Raiders attacking.

I have a technique to easily get rid of deathclaws/raiders. But raiders aren't really a problem.

I don't put rooms on the second row. Also, I did not connect the first and third row with two elevators. Only one. In this manner, the deathclaws will be dead already on the first floor. Just make sure to have your first room fully healed before the monsters get back to them from the second room of the first row. I have 180 dwellers and this technique is working fine for me.

Don't build a radio room at all and stack your vault with resources for a few days by staying below 55 dwellers. I've had zero deathclaw this way, several level 25+ dwellers, and all the training rooms so that when people are on, they hit the cycle to get endurance capped, then other stats based on what room you will assign them to. Once you have your food handlers with max agility, water with max perception, and power with max strength, then go explore the wasteland. Leaving too soon doesn't really help you.

I am playing on hard mode and I am at 41 dwellers. I keep getting hit. My strategy now is to let them pass with no resistance and "hide" my dwellers in rooms they have passed. It works as long as you are fast. Stimpacks are helpful if you cannot move 6 ppl in 6 seconds.

What works for me is when the alarm goes off and says the deathclaws are attacking, I hit the PS button on the controller, then close out the app, then re-open it. Most of the time the deathclaws are gone and no one was harmed, but if they don't go away, then I simply move my dwellers onto an upper rooms floor inside a room the deathclaws have already searched. I only lose about 20 dwellers this way, if you fight them, you can lose a lot more than just 20.