i use an improved clinch but i saw on knot wars a knot that is stronger that i've used a couple times and works well just is more of a pain to tie... i don't remember the name of it but loop through the eye twice then wrap the line around the 2 loops a few times and pull tight
Thats the Palomar Knot Rock solid for floros and braids chech it out on "knots by grog".com