Ummm no learn ot manage ur energy lee sin's combo is already devestating enough as is... which is why he jsut recently saw nerfs... the point of him not having that kind of synergy with his kit is to force him to choose when he wants to use his skills instead of just facerolling every champ he can land resonating strike on
edit: instead of facerolling every champ he can land his AA on after he hits resonating strike its there to make him choose between comboing up or using his AA following his RS to procc the full combo