I'm always 100% certain that 4 Sableye and 1 Smeargle is the best option. Sableye is undoubtedly your better starter, but Smeargle isn't a terrible starter either, nor is it a bad card to have in general. 4 Sableye 0 Smeargle seems strictly worse, and 4 Sableye 2 Smeargle seems like too many Smeargle. Anything less than 4 Sableye is incorrect, imo.