Best choices off of Kier's top 10 (my opinion) would obviously love him to come back to Mason 100%. Also doesn't take into account future transfers each team would have.
Butler: A They lost Baldwin to graduation and Battle to transfer so the minutes for Kier are there. They return a very decent team next year that should compete for postseason play provided they recruit some more depth. Guard position is pretty thin not including Aaron Thompson. I love the fit and think this should be 1st choice.
Wake: A-. This is not because I hope he goes here. Wake will suck next year... But they have a hole the size of Paulsen's belly at the SG position next year. He also will get the play in the ACC market against the best teams in the country night in night out. I like the fit even though I am dead sure he won't see a postseason tournament. Not too far away from family either.
Auburn: A- Would be the only senior on a very young but talented Tigers team. 1 5 star and 2 4 star young ins coming into the program that returns Okoro. This team screams surprise team in the SEC to me next year and I like their tournament chances. Has a chance to start right away with talented young blood around him.
Ole Miss: B- Decent basketball team returns with a log jam in the SG/SF area. Not a ton of minutes to go around with some pretty decent players. This team is not going to be much of a NCAA tournament threat. Kermit Davis is a great coach and is turning them around so I may be dead wrong about no tourney.
Arkansas: C- great coach in Musselman but they are very guard heavy already with a really good PG Isaiah Joe. Currently are -1 in available scholarships without Kier and I just don't see a fit. Not a shoe in to make the tournament next year by any means.They have 2 really good freshman guards coming in and unless that changes Kier shouldn't go there.
Georgetown: C- Clusterf**k squad by Patrick Ewing. Ongoing rape and home invasion allegations that saw 3 players transfer and Mac McClung enter the draft early (WTF). Tons of mins to go around for Kier if he decides to go here but the team is full of holes and I am not sure they win more than 5 Big East games next year. Ewing will be gone after the season.
Georgia B Very athletic squad that should but hasn't yet lost Anthony Edwards to the draft. Would have a chance to start right away but I do not like their chances at a NCAA tourney next year. Currently 0 scholarships available but I expect them to get one open. Not a basketball school.
Mason: B Familiar with the programs and all its ups and downs. Immediately becomes 1st or 2nd best player if injury heals correctly. Odds aren't high to make the tournament and he plays in the A10 with a lack of exposure if he does want to play basketball professionally after graduation.
NC St: C+ Keats coaches a weird style of basketball and is odd when passing out minutes. I have never been a fan of us. The GOAT Danny Dixon might help NC St's chances of landing Kier but I don't see this happening. They have 5 freshman coming in and will be extremely young with mostly unproven big men. Team is currently not nearly talented enough to truly compete in the ACC next year and Kier won't tip that scale. Lost Markell Johnson who was far and away their best player.
Minnesota: B This team needs a ton of guard play to help this season and they just lost Oturu to transfer so I think they go heavy after Udeze from Wichita St with their last open scholarship. I don't think this fits as Pitino desperately needs another big man. Next years Minnesota team should not be in the tournament.
TLDR
Best choices:
Butler, Wake, Auburn, Georgia, Mason