thanks for reply
we wants to short the two LDO'S directly as it seems and no harm and in our pcb there is option of shorting only.
our load is normally less than 100mA but sometimes it goes upto 120-150 mA but not beyond that. so unevenly distributing of load also seems no harm.
we wants to know whether there is any aging effect. upto 1-2 years.
we have tested it upto 20 days. there does not seems any performance degradation.