It's not an option - it's RNG grind.
2 weeks to get to the rest of LFRs of 5.0? And then what? How many weeks in there? Til I get to 480? That is I will need to get 150 ilvls (total not average) from items to get to 480. The biggest difference in ilvl 483 - 463 = 20. The smallest 483 - 476 = 7. Now I cannot control which items I got from LFR - I can get boots which I don't need or I can get cloak which I don't need either, or I can replace 476 item instead of 463. So average ilvl difference is 15 (I rounded up for easy math) - that means I need to get 10 items from HoF and TeS LFR runs - that is 1 item per boss on average (obviously some bosses drop items I don't need or drop more than 1 item I need)
It is impossible to get 480 in one week. And hardly in two. So a month before ever stepping into 5.2 LFR? Some catch up!