30 traits requires some luck finding group / friends willing to carry your ass through some M0 or smth, or you just happened to get 110 on the day where half the wqs are AP.
(Source : did it like two day ago, like 6 AP wq total on the map, took me to around 26 traits and did dungeons to reach 30 / get my 3rd relic)
On topic tho : You can keep getting ap in your main weapon if you never play your offspecs, or fill every offspec weapon up to 35 traits because of 7.2 coming soon.
I believe 54 traits now means you get 3 or 4 traits in your weapon in 7.2, which will take some time even accounting with the new AK levels (I'd say around 10 days if we get AK levels every 5 days like before, maybe less depending on how the AP gains change between M+ / raid / weekly cache / 7.2 quests), so it's still worth doing it if you're only playing one spec anyways.