In reply to antmorgan1991:
Very dependent on rock type etc.
Broadly speaking I use my camolot 0.4, 0.5, 0.75 and 1 most as a generalisation across crags in Scotland.
On peak grit you might find a camalot 2 very useful.
Very hard to give solid advice but i'd be tempted to go 0.4, 0.75, 1
Maybe 0.5, 1, and 0.75 or 2 if you frequent grit crack-climbs. Eventually you'll probably want them all and you can bet that whatever you decide it'l be one your missing that exclusively fits by that desperately run out crux move!