Already tried this I'm afraid, and neither the AE or Losi pistons will quite fit in the 3racing LST shocks.
The stock 3racing pistons are a similar shape to the Losi tho, but the holes will need to be drilled out to 1.10 mm which is the same as the Losi red pistons.
2 holes would be good, and try 35wt front oil and 30wt rear as a starter