Mean Well Issue

I have 2 HLG-185H-C700B drivers. One can power 4 72v cxb3590s while the other can only power 3 of the same COBS. Is the 286/72=3.97 COBS cutting it too close? I'm not sure if I should buy an additional 185H-C700 or just play it safe and purchase a 320H-C1050. Any suggestions? Thanks

Running those at 700ma should only be about 279v. The vf per cob run at 700ma is actually only 69.78v so you should be within range.