For those just entering g-rank, some various random tips I thought of while driving to work this morning:
1. There are a LOT of HR6 key quests. And you can't even see most of them at first, but if you do one posted by someone else it will count as cleared. For example you can't see Jade Barroth or the Baleful Gigginox + Barioth key quests until you clear Barroth and Gigginox respectively.
2. The first thing you do upon hitting HR6 should be mining the fuck out of every gathering quest you can. Enduring charms are the best charm available, and you CAN get them before the volcano. But what you're really after is Hvy Armor Sphere. You can upgrade most high rank sets with those twice, and while you won't quite reach the g-rank armor defense levels you'll come damn close. My Nargacuga armor gained 80 defense in total which definitely helped - I have no trouble surviving hits from Rust Duramboros or Brachydios.
3. If you're the patient type with a high threshold for boredom, Gold Ceadeus is not very hard and his armor set is great. Just make sure you go in with decent defense and eat grain + vegetable for the defense/water resistance buff. Go back and progress the village storyline and do those canteen quests to upgrade your food, you will not regret it. But yeah with those precautions in place, bring lots of potions + honey to make more mega pots and even if you play like total garbage (like me, since I cannot into underwater combat) he will never ever kill you. Oh also you can do him as an HR5, but you can't make his armor until you get Conqueror Seals. You can get those as soon as you hit HR6 in the Jaggi/Volvidon and Baggi/Lagombi quad monster quests, which are easy. You might also need some regular Ceadeus stuff so go grind out those village quests if you haven't. Which you should have done anyways for the farm/food upgrades.
4. Extra monsters will crash your party all the time, and they will be jerks like Zinogre and Pink Rathian. Multiple monster key quests are common as well. Bring dung bombs and flash bombs - don't try to engage multiple monsters even if you think you're hot shit, especially if they are very different monsters who won't sync their attacks. Paintball both and flee until they seperate, farcaster if you have to. Even shit like Great Baggi becomes a threat in g-rank since he tends to spaz out in rage mode - I've seen him chomp out half my hp while I was in a recital, and since he doesn't knock you back he can continue to combo you.
