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I am using NY node, due to I am in latin America, and check the invalid and stale, please:
orker Name: Work Diff :Last Share Shares :Diff :Share Rate «Elapsed :Invalid :Stale :Dup :Hi :Rej Block % :Hash Rate
JDLSantos.MiltonDLS002 7.061k 7s 20,653 179,599,639 5.34THs 39m 56s 0.334% 543,725/58 0/0 57,372/14 0/0 0.006% 7.93THs
Total: 1 (1 active workers) 20,653 179,599,639 5.34THs 0.334% 0.006% 7.93THs
OK probably ping stratum.kano.is and compare to nya.kano.is
If they are about the same, then use stratum.kano.is as your first pool and that should reduce the stales a little.
Otherwise, 0.334% isn't all that bad.
Not being close to any of the nodes will make it a little higher, but that's OK.
Also, the Hi shares will probably not get any more since they usually happen when you first connect, and Hi don't matter.
So you should see the 0.334% go down a little over time.