Brushing points has gone wrong, brothers help

Please recommend which coin to brush Alpha points with less loss!

I have been using SOL's MEW to brush, and the loss has been very little, brushing 4 times 260U only cost about 1U in loss, but today I brushed and it collapsed, directly costing me over 2U. I checked MEW now and saw others' arbitrage robots taking advantage of the fluctuations!

Please recommend something, this loss is too big, ideally keeping the loss under 1U for 10 point levels. Today I lost 4U, that's too much, I can't stand it, brothers!