i made a similar team, it's been well for me on the ladder. i use specs lele, it has no switchins. having the immediate speed on zam is really great too, it's a huge boon vs weather teams.
Tapu Lele @ Choice Specs
Ability: Psychic Surge
EVs: 16 HP / 252 SpA / 4 SpD / 236 Spe
Timid Nature...