Definitely the 2.5 to use up the scraps..But these are my must haves.. Ive got all but the strips, Not too interested in the strips..I have my 2-3-4 inch O'lipa rulers to make strips with
#55004- parallelogram is a neat one
#55039 - Chisel- definitely a must have
#55040- Diamond is another good one
# 55016 - Isosceles triangle is awesome..
#55020- 6.5 tumbler is nice- make a super quick last min quilt
& the new baby tumbler would be good for using up scraps as well..