T issuehe quick balls and repels are a good idea but I found using 2 high level pokemon with the moves Mean Look & False Swipe.
It's better to use a high level pokemon like Gengar as your party eager for using mean look at the first move. But have a high level pokemon (I used my level 100 Scizor) use false Swipe to have health not be an issue.
I used my 2 of my 3 master balls on the roaming pokemon because moltres and raikou were too hard to catch.