litttle overfed, little senescence... looks like you still have some ripening to go... then, you just start scoping trichomes on the calyxes until you see the right amount of amber - this will be somewhat of a personal preference you'llhave to experiment to find.. 5-10%? 100%? calyxes only and multiple locations of plant assessed, not just top colas.
while fertilization may be a bit out of balance, ceasing at this point might not be wise. building terps and thc requires building blocks. it just doesn't manifest mass out of the ether.