Wow, you weren't kidding on the difficulty. Lost my first world once the No Shelter invasions started.
I had towered up on some cobble in an attempt to escape the mobs. I thought I'd be clever and try to make the base of the tower out of a Tile Entity with an inventory, perhaps the mobs wouldn't break those. Unfortunately, they didn't care one bit, and quickly smashed through the floor of Tinkers' Crafting Stations. I was forced upward, panicked as I watched them destroy my one hope. At the top of the tower there was a moment of reprieve, when I saw the zombies could only slowly build up. I could easily knock them off the structures they built, I was safe. Then the first invasion platform appeared. A panicked shout "WHAT?!," and quickly I used what little cobble remained to ascend higher in hopes of escaping. Slowly but surely I disposed of the zombies rising from their platform. Just as soon as I did, another spawned at my level. Okay, I can do this. Knock them off. One by one, I can manage.
Checking the moon, it would only be two or three minutes til sunrise. I'll survive. Another platform spawns, and I ready myself to take on the incoming horde. Before I can barely begin though, a second platform spawns. Panic sets in. "TWO?!" I'm pushed back off the platforms and onto my tower. I can't take them all, there's nowhere left to go. The sun will be up soon, but not soon enough. The horizon begins to brighten, but it's too late, they're right next to me. Even if I survived, I'd no doubt be bitten multiple times. Some raw food had forced me to use my single antidote already. I can't risk it. So, as they approached my cobble tower, pushing me back toward the edge, I made the decision to take a few steps backwards. I would die as a human.
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So the pack has made an impression on me, that's for sure. I'm on my second HC world now, and I've got a smeltery and some iron armor. I should be safe for a while, until the difficulty begins to really ramp up. On that, I'm curious. Have you tested this pack into the late game? I've only played with the Apocalypse mod in MadPack 2, and it got pretty insane there. The only way to keep up was to get super-powerful Magical Crops gear. Eventually the "Bad Moons" got so bad they would lag out the server with how many mobs they spawned. You may have it configured differently, but just in case it hasn't come up as a problem yet, it's something to think about.
I will say that the magically appearing platforms do seem a bit silly, but I guess a little bit of broken immersion is the price you have to pay to get the difficulty level you want in this pack. The Lycanites Events and WInter Gifts also feel a bit out of place in packs like this, but that's just my opinion. In any case I'm looking forward to playing more.