Without the 3 we could still play a good side such as:
Myhill
Gamboa-Wisdom-Olsson-Pocognoli
Yacob-Gardner
Berahino-Sessegnon-Blanco
Ideye
Yacob may not give us Mulumbu's energy and all action play but he can just sit in midfield and play his normal game which could be good to combat Everton's very good midfield. That leaves Gardner to play the energetic midfield role and even though he isn't as good as Mulumbu, he can still do a good job.
Of course the above is just a contingency plan. Hopefully the injuries won't be to bad.
Myhill
Gamboa-Wisdom-Olsson-Pocognoli
Yacob-Gardner
Berahino-Sessegnon-Blanco
Ideye
Yacob may not give us Mulumbu's energy and all action play but he can just sit in midfield and play his normal game which could be good to combat Everton's very good midfield. That leaves Gardner to play the energetic midfield role and even though he isn't as good as Mulumbu, he can still do a good job.
Of course the above is just a contingency plan. Hopefully the injuries won't be to bad.