Lukaku and Neymar will definetly not come into the first team straight away, they are only 17 and 18 respectively so they will have to be bed in and have to be rotated in the first couple of season at least, I doubt we can sign 3 strikers but 2 of the 3 looks likely, Neymar and either Kun or Lukaku... Neymar acts as cover for Torres for the first couple of season at least allowing him to adapt himself to English football instead of being slotted straight into the first team and Kun or Lukaku rotating with Drogba, Drogba will probably be sold after 2 seasons and by then either Kun or Lukaku will have sufficient experience and knowledge to slot into the first team, sounds like a decent plan to me
Torres will also be gone after 6-7 seasons or be benched atleast and by then Neymar will be in his prime so he will be in the first-team, i suppose u can srgue that one of the strikers we buy may turn out to be a flop but thats football