For mass--a higher test, lower tren cycle would work better
So instead of 250 test, 500 tren maybe reverse it and do 500 test and 250 tren.
Test will be the primary driver of growth, while the tren will keep you lean and drive IGF-1 into the muscles. Test is a better mass builder than tren though.
Also not surprised you're having bad sides at 500. You could have started at 200-350 and made similar gains with a fraction of the sides