For NRL22/NRL22X given that it's out to only 400ish yards at most and generally you're doing 90% of your shooting within 200 yards, I'd choose the reticle that you like the most and is easiest for you to be able to hold wind, and do holdovers on the clock.
For the NRL22X matches I've been there have been CoF with 12 shots in 90s across multiple distances and positions. So holdovers/trees with wind are a must. A lot of stages have back and forth holdovers, so you're jumping across different holds over and over.
Reticles are a very personal thing. For myself I had trouble with a lot of reticles where the mil marker was on the edge of the tree. Maybe with enough practice I could really be confident that I'm on the holdover but tracing the # on the tree was just slower and was costing me time. The reticle that ended up being my favorite out of everything I used was the Razor HD AMG. It has the markers right down the vertical stadia.
The other thing to note is that like general PRS competitions, balance of the rifle is rather important. It's not essential but, balance + light triggers, you can 'game' yourself a few points. Same way people do it in PRS, they rest the rifle on the barricade and free recoil it to eliminate as much wobble by the body as possible. Given that majority of the chassis are built for centerfire in mind, getting your rifle to be balanced in front of the mag well is actually a challenge in rimfire, unless you plan on adding a ton of weight to the front. You can do it, but now you're looking at an 18-20 lb rifle.
18lbs rifle are fine, except that NRL22 always has an unsupported offhand stage. 18lb rifles are a bitch to offhand...
The point of the weight thing was that adding a 40oz scope to your rifle makes it just that much heavier.
A lot of the benefits of cutting through mirage, 56mm objectives, and all of that when shooting out to 1400 yards, in dusk/dawn etc, doesn't really happen in the rimfire world out to 400 yards, so that's why I think it's plausible to get a lighter 30mm scope, NX8 4-32, Razor HD AMG. Cutting 2lbs off the weight of your rifle to have it balanced is pretty nice.