Doesn't it also depend on how many alts you have. I only need 660 more rep to reach the weekly max, but that's cause I been running 4 50's so far and I still need 1 more 50 I haven't started on yet. just started today on the event too.
I reached the cap by doing the dailies 5 days on my main and 1 day on my alt. so you can reach the cap perfectly fine with 1 character if you play every day.