Haxys Pandemonium PvP is a tough custom kitchen sink modpack server built for grinding, fighting, and making smart choices if you want to stay on top. AutoModpack handles the downloads and updates automatically, so you can jump in without messing around with manual installs every time there is a new version.
Pandemonium mixes expert-style progression with custom recipes, so tech mods are not something you rush through. A lot of the modded path is locked behind earlier steps, which makes progression slower and a lot more deliberate. PvP is always on, base raiding is part of the deal, and you should expect other players to be a threat whenever you are out doing your thing.
There are also custom systems meant to shake things up, like play tokens, supply drops, cursed rings, lifesteal, and fully custom void miners. Play tokens work as a reward for voting and time spent on the server, and they can be used for resource generation, supply drops, and extra hearts. Supply drops can help you skip ahead a bit, but they also announce themselves to everyone nearby, so yeah, risk and reward.
Botania has been made harder too, with expensive recipes and some familiar flowers disabled, while extra addons help fill out the progression. Overall this is a modded PvP server where survival, raiding, and progression all matter, and the pack is built to keep pressure on you from the start.