Unless you're drafting a player that you can build around, you draft the best player for the system you run.
Right now it's looking like Brown,Dunn or Heild. With Heild and Dunn, you might have to move some one, but both bring something to the guard table. Brown, if he can get a decent out side shot would be what you want for a SF. If Durant is off the table, he can mentor under Crowder this year, and maybe he shoots past him by next season.