A good benchmark for raiding is the same ilvl as the raid itself. A common myth among players is that raiding is meant to increase ilvl. As someone who pugs consistently I will tell you that typically I clear a raid for weapons - specifically with corruption now - trinkets, and azerite. The ilvl itself is trivial and I do raiding for the massive numerical boost to performance from optimizing gear rather than ilvl increase. It is also helpful to farm the raid twice each week on the two highest difficulties you can, because it increases your personal generation of corruption. Most corruption is worth 10+ ilvls, especially some of the rank 3s. I have rank 3 twilight dev on a 410 ring which I will probably use for the rest of the expansion. There are exceptions to this rule such as gushing wounds and infinite stars, both of which you really only want on max level gear since they scale with ilvl. Gushing wounds is especially powerful for 15 corruption and always worth holding on to since it lets you play tetris with gear and corruption.
For normal, start doing it at 445, for heroic 460, and for mythic, 465 min. 470 is very easy to obtain for mythic raiding, and merely requires you to complete 3-4 m+ 15s for the week. Farming 14s or higher yields 465 gear in the end of run chest and completing a m+ in time yields an extra piece of loot. There are many people who will disagree with this and that’s fine although generally pugging heroic with people below 460 equip simply results in lots of wipes and the run itself taking far to many hours. On average my AOTC heroic full clears take about 4 hours in a pug and 2.5 hours in a guild preform if everyone is on their main. Prior to earning AOTC you should expect to wipe on new bosses you’ve never done and you should, as a hunter especially, strive to learn mechanics and be the mechanics player on fights. For Xanesh volunteer and learn the orb, it’s not that hard and most people can master it on 1 or 2 pulls just look up a video. On Vexiona MD adds. On Ra’den do 1 lightning soak per lightning phase etc. Hope this helped.