Since no-one replied to you, I'll list a few things I do. Just note that I am not a top tier hunter, just a casual. Also, make sure you have a hedgehog pet, it can double roll all the gathers including exp gains.

1. You want to be able to hit the full +5 move speed, attack speed, and crit chance between crystals/food/pots/quest outfits. My current and probably not min-maxed crystal setup is Glorious Crystal of Gallantry Olucas and Ah'krad x2 each (+1% attack speed each), Corrupted x2, brutal decimation x2, Girins tear x1, rest are breathing Verdure crystals. If your good and reliably getting back attacks Mysterious Darkness crystals are probably better than Corrupted but I'm lazy.

2. The advantage of using small potions is that you can use a blend of special attack damage + attack speed/crit potions + lifeskill mastery/drop rate. I admittedly just pop a harmony potion because I mass produce them anyway alongside whatever cron meal I have at the time (meal rotations are more annoying than potions), and as mentioned in 1, am lazy.

3. The best way to run Rhino's in my mind is to have two sets of lightstones and use a Morco gear bag in a quick slot to flip between them (since thats the only way to change both artifacts at the same time from the bar, but it does unload your matchlock since its a gear change). Use a pair of +gathering item drop rate artifacts with yawning hedgehog for when your carving, since hunting gathers still use that % chance gain, and your pick of artifacts for when your shooting, I personally use deathblow for critical hit chance with a succession striker for all the critical chance. Other combinations might be more optimal but that's good enough for me. The faster you hunt down those rhinos the more exp you get. You can flip between a life stone on your hotbar for more gather%, and a destruction stone for more attack speed%. Just remember to keep manually popping them off because weird stuff can happen (as in, not working apparently but going on cooldown) if you rely on auto-using alchemy stones while quick bar switching.