5 rakes means it requires 50 SL coaches for regular rakes and additional spares will be required too. Does ECOR have that many SL coaches ?
I doubt RB will allot such high number of SL coaches considering it is their instructions that zones are following to reduce SL coaches to 2.
Maybe initially 2 rakes will be LHBfied with 10 SL coaches then all 5 rakes will be LHBfied with reduced SL coaches.