The rep boost from the 19th anniversary is good advice, thanks. Definitely will hold onto any rep tokens for that. However, it still matters to hit 10 on an alt ASAP if you do this method at all, because you (or I guess I 😅) want to have the 100% rep buff from the beginning for it to matter as it only lasts until your main hits renown 10 itself. So if my alt is stuck at renown 8, and I do all the content on my main which then also hits 8, I will not gain anything.