I haven't beaten the game on Terrified yet, but here are my tips & tricks! Feel free to comment with your own too! :D

Stuff You Wish You Knew

• It's 15 levels to a run
  
• You can revive from a random hook after a delay
  
• Feng Min unlocks upon winning ANY run

Run Don't Walk
Enemies scale with time, you scale with Runes & Skills. Farming in earlier rooms only mean you're dealing less and less damage to ever stronger enemies. I find that rushing through the levels and getting the fog out asap works best for quick runs (~25-30min).

Always Be Shooting
You can hold the fire button to auto-shoot, making it less likely you'll hurt your hands.Make sure to aim to enemies and just keep the damage going.

Danger Everywhere
Barrels, spikes, bumpers... there's progressively more of those as you increase the base difficulty. I usually try to explode the barrels at the very start so they don't take half my HP when I get bumped into them!

Shared Bloodpoints, But Not Powers
In multiplayer, you're sharing the BPs with your ally, but only the one picking up the Rune will have the power (except for specific ones telling your otherwise). Some are better for some characters than others, so it's best to try and learn what they do/look like.

Overview
Dwight's a bit trickier to play at higher difficulties because he can deal a LOT of damage, but he has no way to heal himself. If you've got an ally playing Feng Min, you'll get more out of him in multiplayer!

Skills
Without going too specific with Skills (it's fun to experiment), Dwight really shines if you can max out his damage. That Duplication (more orbs) and Explosion (bigger AoE and damage) for ya!

In multiplayer, you can also try to focus the Support skills (which you can use when you're dead or escaped first). With the right build, he can spam huge columns that stay for a long time and deal massive damage to anything entering them (and they also decrease your ally's defense).

Important Runes
For a Golden Run, look for damage and crit buffs (more orbs per shot means more chances of crits triggering). The Bracers, which shields you when your HP drops too low are also a good pick to prevent those one-hit defeats.

Unlockables-wise, you might want to focus on getting the Ring of Healing. Get that on Dwight and now you CAN heal (whenever you open a chest, but still).

What are your Dwight builds & tips?

Overview
Claudette's a must pick for anyone who plan to stay away from the enemies. With her accuracy and piercing arrows, she can deal a lot of damage if you line your shots right. Juts remember to use the trampoline and caltrops to keep the enemies away!


Skills
You tend to stand still when you shoot? Then Bandages and Aim Down Sight should fit you. Just make sure you don't get cornered...

Otherwise, her damage can scale quite crazily if you can get Poison and Splitting arrows to max levels.

And the Companion's cute and deals decent damage. Especially useful in single-player as bot coop buddy!

Important Runes
As she's more of a single-target attacker, anything that boosts your attack rate should be prioritized. And since you'll be jumping around on a trampoline, might as well focus on traversal buffs (speed,. jump, double jump) and pair that with the Airborne damage buff!

For Unlocks, Stationary Defense pairs well with her standing-still Skills, and the Pact of Power makes her shot super deadly (but you'll have to keep an eye on your HP).

What are your Claudette builds & tips?

Overview
If you've unlocked her, Feng Min will keep everyone alive! Spam the healing pools and watch as you sink the damage from enemies. You won't get as much damage out of her, but with time and sweat you can survive just about anything!

Skills
The Pain Train approach is to max out her Crushing Sprint Skill. If you can handle the crazy speed, you'll be dealing so. much. damage!

In multiplayer, if you max out her longer pools, you can end up spamming them, creating safe(r) zones around the arenas for you and your buddy to use. Oh and they stack, for faster healing!

Important Runes
You're going to need help with your damage for Feng Min, so focus on those Runes. Otherwise, be prepared for a very resistant noodle build; you won't die, but neither will the enemies. That's one of the main reasons I'm seeing runs exceeding 30m tbh.

From the Unlockables, there's a bunch of advanced defense Runes which can make you even tankier, relying less on healing so you can focus on damage skills.

What are your Feng Min builds & tips?

Hope it helps you :D