Best way to achieve raid0 (or just better performance) with proxmox on Kimsufi (windows server)?

I'm fairly new to proxmox and have only hosted a few personal projects on linux. I'm using a KS-LE with 2*2tb drives. I'm trying to host a windows server install that will be used for a game server. As well as one or two linux VMs for tinkering. I'd like to get the best disk performance I can since I just want the server to perform as well as possible. I'm not overly concerned about data loss as I'll be doing regular backups of the server config and game world.
I followed the proxmox windows 2022 best practices here: https://pve.proxmox.com/wiki/Windows_2022_guest_best_practices
However things "felt" slow. I'm wondering what the best approach is for better performance and/or raid0.
Based on the kimsufi installer here:
My ideas are either to:
set var/lib/vz to raid0 pre-installation
shrink var/lib/vz and create a zfs raid0 after installation using proxmox.
I was just wondering if either of these is a better idea, or if there is an option I'm missing. apologies if this question is basic and/or ignorant. I appreciate any and all feedback.