I am 'fairly' certain what i will use to lift my 2018 SR5 Premium 4Runner.

I am looking to 'level' and reduce nose dive / cornering, and generally 'tighten up' the vehicle. This will not do any serious wheeling, but may see some of the easier / moderate trails in the Phoenix area.

I'm leaning towards Eibach Protruck shocks (possibly bilstein 5100, probably Eibach) and the OEM springs.

I have a pair of Toytec 25912 spacers (1/2 inch top mount) and here is my dilemma.

Do i set the shock at the 3rd perch (1.6" eibach / 1.85" bilstein) and add the top spacer for the last 1/2 inch. This would compress the spring a little less (i think), or just toss the spacers and set the shock to the 4th perch (2.5" on both), this would tighten the spring a little more (i think).

On the rear 3/4" or 1" cornfeds ? I'd like to run 275s but I have only seen them in an LT tire. I don't want to go to a 285, so i will probably use the largest 265s i can find (TerraGrapplers or Wildpeaks AT).

Thanks

Can't comment on the lift questions but am happy with the beefy appearance of my 265 General Grabber ATX's. I think 44lbs in standard load - few threads on this forum about them if you want opinion re: performance from folks who have had longer than I. Here's some pics below.

https://www.toyota-4runner.org/3378419-post74.html
https://www.toyota-4runner.org/3378177-post675.html

Sounds like the Eibach pro kit all around is the way to go for what you are looking for in ride, drivability and mild lift and yes avoid spacers when possible. The Eibach kit will be all matched for struts, springs and shocks vs some of this or that. Lots of postive reviews on here.
Good luck!

Personally I'd ditch the spacer idea and run the Eibach spring/shock.