If we are doing same for L900, new candidate selection option setup showing disabled and giving msg as: there is no template corresponding to the current layer configuration, select the template to be used in the zone when adding new candidate site…
For your requirement you can set in Objectives tabs, then create parameter each objective :
RSRP, can be set the minimum value as per requirement.
Overlap, can’t set by percentage of overlap, but can be set by delta margin from first best serving to n (can be set how many server in overlapping area) best serving at 1st - nth difference.
Throughput, can be set at RLC (it’s download RLC throughput). or using PDSCH CINR or RSRQ mapping to throughput value, can be set by coverage of each parameter that mapped to throughput.