as far as anamul and mominul go, mominul has been the best A team batsman, anamul has been the best FC domestic batsman. one thing to think about is if they are going to be long term #2/#3 it could be an idea to introduce them at the same time, that way they learn together and can build a really strong and solid partnership which BD surely needs between it's openers and #3, then nasir/shakib at #4 and #5 they're also great at making partnerships so from that we could build a really solid batting line-up with mushy playing as the finisher as such i.e. the batsman who can play a good innings batting with the guys higher up but can also play with the tail enders to get to a good score.
also surrounding anamul and mominul with tamim, shakib and nasir can only be a good thing imo, shakib and nasir especially are good at playing the situation well and making partnerships.
All Time Test XI: 1 Hobbs 2 B.Richards 3 Bradman 4 Pollock 5 V.Richards 6 Sobers 7 Gilchrist 8 Miller 9 Procter 10 Botham 11 Warne