1) are there any random ass wipes that are 1.21
Nope.
It will be a part of a foraging update which isn't here yet
2) what mods do I need beside Skyblocker Sodium and Nochangethegame (also like chat copy mod but eh)
Do you need like whole ass long list of performance mods?
Sodium. It is like optifine - if optifine was good (OF on modern versions causes only harm)
Concurrent Chunk Management Engine
Entity Culling
More Culling
Cull Leaves. There is a cooler mod that looks less ugly but it is not updated
Lithium
Iris Shaders. Yes having mod for shaders improves performance as long as you don't use shaders
ImmediatelyFast. Doubles your FPS if not more
Sodium Extra
Very Many Players
Particle Core
also nvidium if you have nvidia gpu 16xx (2018 year) or newer | Not updated to a recent version
Saved
too much FPS and that 500+ FPS counter is annoying you? Wanna get fancy? Let's do it together!
Bobby. Must have "Dynamic World Management" enabled in config! After you set render distance to high values you can see whole skyblock world. It doesn't hurt FPS this much either...
Language Reload
QDAA. Anti-Aliasing if you need it (you probably do - as long as your PC doesn't run on coal)
Zoomify. Self-explanatory
Sound Controller. Let's you disable/lower some specific sounds
Remove Reloading Screen
Gamma Utils OR
Methane. GU is just fullbright while methane is a cursed mod that just kills light engine for FPS. Yes, there is a difference - even with cracked gamma from full bright shading still works and it looks nicer
Dynamic FPS. Locks FPS to 15 when you are NOT at your minecraft window, saving you computing power (New version have built in FPS reduction)
Adaptive Tooltips. Aaron ported it to new version - you have to build it yourself (edit: it is now merged but still no official build for some godforsaken reason)
Aaron's mod. Mod for skyblock by one of maintainers of skyblocker. Has some niche skyblock stuff + M7 stuff
(also get all depends for those obviously)
UPD month later:
since I sometimes share this link to ppl as guide on "which mods do you get", here are links to sodium and NCTG:
UPD 2 like half a year after:
some mods are not updated so I marked that
NoChangeTheGame. Solves 99.5% of compatability issues with hypixel's servers that admins didn't fix. Will be useless once we get proper support tho | As for making this edit - not updated
You also need to get libraries and other depends those mods have. Good launcher will grab them for you, otherwise you just see which mod you lack.
a way to lose a lot of FPS because this combo will give you that cancerous sidebar with items so you can, in theory, click on them for recipe. And items are expensive to draw because minecraft moment. Stuff like this is justifiable in content modpacks, not in game that has several ways of viewing recipes
/recipe <query> and recipe book in skyblock menu are a thing