I dont know about that since i've been running expert, though i've also got herts from the occasional few times i run standard(obviously not every time, same goes for expert).
Though, i think expert is still worth it in it's own way (the lucky drop of SSR weapon), i believe expert have a higher Platinum/rainbow(however you wanna call it) chest chance than standard (as i got mine from expert so ..... ) yeah .....
Currently Working towards my third apoc as well, and third(second from token) weapon ._. .... though i think i've ran out of luck now :/