I prefer irons in the very bottom of the window, lower than a traditional 1/3 AR mount. There’s no sense in buying large, clear glass and then filling it up with iron sights you aren’t using anyway.
As someone else said, an MRDS specific presentation helps a lot to reliably find the dot.
And I also prefer a larger dot that doesn’t need to be bloomed in the daytime. 6MOA isn’t too big for handgun shooting.
The ACRO P2 is good, probably the best option for a hard use optic.
Buying Holosun is just paying for the Chinese military’s R&D.