My collection of guns and glass are all less expensive. Under $500 guns and scopes around $200. I am still getting set up to shoot HFT but I plan to use my Athlon Talos 6-24 scope. I put a large UTG parallax wheel on it and just finished putting a mm stick on measuring tape on the outside. It will focus down to 8 yards so I started there and determined where the wheel wants to be (in mm) and where my POI is by yard out to 17 yards then I jumped to 20, then 22, then 25, then 30 etc.. The wheel is not huge and the parallax settings started getting fairly close to each other by the time I got to 35, however. I shoot from my left shoulder so it is harder to see the parallax wheel and I'm not sure about the huge oblong wheels.
The reticle has marks every 1/2 mil which are accurate at 18X. But it is not terribly hard to convert that to 16X but it pretty much doesn't matter if you know where your guns shoot. My range care will have mm, distance, and "tics". I think it will be easier to just count the "tics" than "apparent mils" or something. I already make a label to go inside the lens cover for the objective lens with this information for the important distances including "tics" at 6X - my normal setting for hunting. I left off information from 20-40 yards because the scope is zero'd for 35 yards and the hold under at 30 (the maximum) is about 1/4 inch. Negligible for hunting. But for FT, the card will have all the info.
I have a scope with a Christmas tree reticle but it seems cluttered to me. I like a simple mil dot for hunting but I think more marks and fine lines make sense for shooting targets where there is plenty of time. Duplex is not enough information and Christmas tree is too much for me.