My strategy would be very simple...
Sign Todibo £20mil / Gabriel £30mil / Sarr Free / Emerson £20mil
RB: Emerson / Kenny / Coleman
CB: Holgate / Mina / Keane / Todibo / Gabriel / Gibson
LB: Digne / Baines / Sarr
We will have spent a max of £70mil on those 4 players...with a bit of negotiation, perhaps £55mil+
Im confident we could offload a couple of players to bring in £30mil which would mean £25mil -£40mil spent on 'completing' our back line.
....it would be extravagant to have 3 RBs. Brands has already spoken about having too big a squad. I imagine the interest in so many CBs is to have a back-up if the favoured deal(s) fall through.