14. KZ Okpala - you want to grab the next "Siakam"? well this is the guy. 6'8-6'9 F with 7'1 wingspan. The way he can find space/creative ways to finish around the basket is elite. Hard to stop once on the move. Good shooting form. Good versatile defender. Needs to add more mass
highlights
https://www.youtube.com/watch?v=z_w80av02mw
20. Naz Reid - A 6'10 version and better shooting version of Montrezl Harrell. Loves contact around the basket. High motor. But can also spread the floor and hit the 3's. Needs to learn how to harness his energy a little better at times but is still young
highlights
https://www.youtube.com/watch?v=G6KEAOQkWo4
22. Cam Johnson - From 6'2 pg to now 6'8 g/f. He reminds me of Shaun Livingston/Klay Thompson. One of the top shooters. The issue is , is skinny and can be considered either a versatile defender or tweener defender that can't really keep up with top level guards but not strong enough to defend forwards. End of the day, could be a very good 6th man/3 point specialist the Celts could use
highlights
https://www.youtube.com/watch?v=CFP9S67i-aw
Okpala has a very ugly herky jerky style which I find hard to watch. Don't want him, especially not with #14. Reid is a weird player, but he's too much out of control and I don't think much of him as a defender. The only pick you proposed I believe to be reasonable is #22 Cam Johnson, but he's more someone you'd take if you're specifically looking for a shooter of the bench. That's not what the Celtics should do, we have to shoot for the fences and try to find that player that everybody overlooks that has hidden potential. Reid would fit that description, but that's not the guy I like 
We are talking about 20 and 22 picks
and you sound like you want to find the next top 10 pick at these spots
cmon
I personally don't care about "style" as long as they can help make an impact
Team doesn't need another ball hog like Irving. Team has enough wing facilitators
Okpala ability to drive and finish would open things around the perimeter. Naz Reid is very good on the low post that could potentially open things up again. Cam Johnson = self explanatory
when you have the Bucks , "sitting" on your easy to guard team offense (everything to the perimeter)... you need to add different looks
Celtics should aim to build their roster like Raptors/Bucks. Inside/outside offense + versatile defense