#187 - for foundation, blush
#168 - for blush or contouring
#217 - pack color onto the lid, blending
#266 - applying fluidline or gel liner
that's the must have..
others :
#109 - for contouring, highlighting, applying liquid foundation
#239 - for packing color onto the lid (you can either use this or #217)
#219 - for defining outer V, smudging eyeliner