You're pretty good for just starting! You already knew to add collector. However, I would recommend one of two routes:
Straight LostGar (Gengar x3 Mew x4 and some more room for T/S/S)
Disruption Variant (preferred--Mimejr x4, no psychic energy, 4 rescue energy, Vileplume x2, Hypno HGSS {causes...