After 2-3 days experimenting, I can say that there are enough alternatives to Claymore's miner. With xmrig, xmr-stack and especially SRB I can achieve stable 450-500 h/s for tahiti 280 cards, 715-750 h/s for hawaii 390, and 910-930 for polaris 570 and 580 cards (with the usual bios mod and overclock as for ethereum). I don't need Claymore' s eth miner anymore also. Xmr is more profitable than eth, and with the coming reduction of the eth reward the minig of eth will be near its end. Thanks to Claymore for all his job so far, but it is time to move on! 
I installed all the options for mining programs on the new algorithm (Monero V8),
but they all can not work for a long time, they do not work for more than an hour or two and they need to be rebooted.
This has never happened during Claymore program working, which works for several weeks and even more than a month without a break and almost never turns off.
So, program from Mr.Claymore can not be compared with any other program!
We must all ask Mr.Claymore to write an update for his program to version v11.4
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Dear friend Mr.Claymore! We want to see the program update (CryptoNightV8, CryptoNightSaber, CryptoNightHeavy).
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Thanks!
Regards,
George