a quick glance i could see 6 acc teams, 6 big 12 teams, 4 big east teams, 6 big ten teams, 3 pac 12 teams, 5 atlantic 10 teams, and 2 sec teams
I know it's quick glance...but that's only 32 teams....and 7 of those will be auto bids
32 auto bids leaves 36 at large bids to get to 68
so you need to find 11 more teams from the at large pool
Let's start wit the ACC getting six teams...5 are relatively safe (Cuse, Duke, Pitt, VA, FSU) all have RPIs high enough right now that there's no way they'd not be included...likely UNC and Wake at this point would both make it despite up and down resumes...so that's 7...that gets us one extra bid
6 Big 12 teams...that seems right...but Baylor despite a 1-5 conference record still has a bubble RPI and some solid wins over Colorado (with Dinwiddie) and Kentucky...so far now let's slot them in and get us an extra bid...7 for Big 12 gets us one more bid (need to find 9 more now)
4 Big East teams...this seems likely but Providence is shaky bubble right now...Georgetown or St. John's could get hot down the stretch and replace them...but four seems about right
6 Big 10 teams...I think it's going to end up at 7 or 8...Illinois and Indiana each have enough good games on the schedule to make a push off the bubble...split the difference and say one of them makes it to get us up to 7 Big East teams (need 8 more now)
3 Pac 12 teams...you're quite a bit low here...Oregon is struggling but still has a tournament RPI and resume...Cal lost two straight but their RPI and resume would likely be included too if we start right now...ASU and Stanford are hovering on the periphery too...this is likely a 5 bid league...(need 6 more now)
5 A-10 teams...this is hard for me...I love the A-10 this year...UMass, STL, GW, and VCU I think are good to go if they take care of business...to get that 5th Richmond needs to beef up it's resume...RPI is bubblish but the UMass win will hold weight...likely need a split with VCU and beat GW at home along with a good tourney run to make it...Dayton is the more interesting case to me...their RPI is significantly lower but wins over Gonzaga and Ole Miss and Cal come in handy big time on the bubble...could be anywhere from 4-6 to me...but let's stick with your 5 prognosis here.
You did forget the American will likely get 5 bids (Cincy, L'ville, Memphis, UConn, SMU) although SMU and UConn could easily slip by year's end...but let's give them five...that's four at-large steals (need 2 only two more now!)
MWC likely gets two in as well (SDSU and New Mexico) takes care of one more at-large bid (only one more)
2 SEC teams...Florida and Kentucky are all but guarantees with 5 and 13 RPIs...the rest are all on the bubble...but what are the chances that they take Indiana State or Saint Mary's or La. Tech or somebody of that ilk over a third SEC team???...probably really slim...the SEC will get at least 3 teams in
here's the other problem...the SEC's 3-6 are all clustered in bubblicious RPI territory (52-62)...and some have decent bubble wins on their resume...Tenn beat Xavier, Wake, Virginia, and LSU this year...Missouri beat UCLA but not much else...Ole Miss only has an LSU win as their best win which is ugly...LSU's best win is Missouri at home
Tennessee based on those wins is going to get in right now
But let's be real...it's still a little early to start giving out bids...these major conference teams can shoot up the RPI by holding serve at home and knocking off teams like Florida and Kentucky at home will have them rocketing up and those mid-majors have very few shots to pick-up quality wins
in all likelihood the SEC is going to get 4 teams in...better come to terms with it now than later.