Realistically speaking, what are peoples' assessments of Castle and Harper's ability to shoot in the future? For reference, Jrue Holiday in his 20s topped out as a 35% shooter on 5.7 attempts per game in his age 29 season. Jalen Suggs had 1 season shooting close to 40% and has been around 31% every other year. Fox has had 1 season shooting 37% on 8 attempts in his age 26 season, outside of that before this season he's been low 30s. Looking at these comparisons, is it likely to expect both Harper and Castle to achieve 35% shooting on 6-7 attempts in the next 4 years when they'll be 24 and 25 respectively?
And if you take these two and Fox to be your backcourt for the next 4 years, where two are going to be on the court at any given time, does it make sense to overindex on shooting at the 3 and 4 and give up some size and rebounding? This is why Champagnie's development this year has been critical and he needs to be retained if at all possible. This is also why Carter Bryant's development is critical - he had all the shooting signals coming in - shot 36% on 8 3PA/100, FT were low in college but was shooting high 70's on a much larger sample size in high school indicating that he has a shot at becoming a good high volume shooter.
This is why I worry some about taking guys who seemed like they made sense previously - Yaxel, Karim Lopez, Cenac, Ament, Haugh, Tounde, even though I like a lot of these guys. These are not guys who profile as high volume shooters who can compensate for lack of guard gravity. On a normal team with at least 1 +shooter in the backcourt any of these guys would work fine, but this works less well Castle/Harper/Fox backcourt, specifically in the next 3-4 years. Guys like PJ Washington/Okongwu, while decent shooters for position, are probably not going to cut it at the 4. Then when Wemby goes to the bench, if you have Kornet out there who doesn't shoot 3s, that's 3 negative spacers relative to position. If you look at the best shooting wings in the draft, most guys like Karaban, Momcilovic, Pryce Sandfort basically don't offer any ancillary skills aside from high volume shooting and so might only be good in a bit context.
Then you look at shooting wings who offer other skills - high volume 3PA, decent FTR/rim attempts indicating the ability to get to the rim when they're closed out, BLK/STL%, rebounding, passing ability, and you get:
Keaton Wagler
Cam Carr
Braylon Mullins
Isaiah Evans
Paul McNeil
Mullins and McNeil are slight shooting guards who can't get to the rim
Wagler would be awesome, but he's trending to a top 6-8 pick and is going to be out of the Spurs range
I'm not sure how Evans has been this year, but last year he literally didn't offer anything except shooting
This is why I'm starting to trend back to Cam Carr. The combine measurements are going to be huge for him - ESPN lists him at 175 lbs, Baylor lists him at 190. 175 puts him in Rob Dillingham weight and that's a non-starter for me. 190 with the potential to increase to 200 is wing territory and palatable to me, especially if he measures out 6'6 in shoes with a 7'1 wingspan as has been widely rumored. He offers secondary rim protection and some rebounding due his high level vertical pop, he shoots 40+ percent on contested and uncontested catch and shoots, his confidence is sky high, he takes and hits some very deep 3s, and he gets to the line often. I'm not looking for him to play the 4, but rather the 3 with Champ/Bryant manning the 4 while we have a minus shooting backcourt. I really hate overindexing on shooting, but I feel like if you truly believe in Castle/Harper as the backcourt of the future this is probably the way the team has to go.
For defending big forwards of the future (Randle/Gordon/Boozer/Scottie Barnes etc), see if you can grab Morez Johnson in the early second round to do his best Okongwu/Beef Stew cosplay for the future and replace Harrison Ingram. Yaxel would really be ideal here but there's no way he lasts until the second round unless you can trade the Hawks pick for 2 mid-firsts. Morez is putting up similar numbers at age 20 as Okongwu at 19, his FT% is up to 80% this year and he's shooting 40% from 3 on very low volume with good percentages from midrange so the shot is something that might come around in the future.
Finally, go get Krivas with a third second rounder to be your third big, he's 7'2", he anchors Arizona's defense, and he's shooting like 80% from FT so he should be serviceable. I'd normally say something like Ivisic for his shooting but I stopped taking him seriously as a prospect last year when CMB looked like Shaq vs Shawn Bradley against him last year.