This is kind of a tough question without knowing the rarity of the candy and dust in your case and whether you want or need attackers or defenders etc.
In regards to eggs I quit caring about IVs for them long ago. They are common enough here that I can find one with very high CP and evolve it straight into a defender with zero dust investment and less candy.
I think some would power that Rhydon although I find I rarely use mine.
