Weapon pool Cliff's notes (are Cliff's notes even still a thing?)
It's important to note that weapon pool provides a few things:
- It's the damage source for ALL your characters. Some get more damage from your pool than others because of weapon type preference but the pool feeds everyone's damage not just the main character.
- it also provides additional hit points above the base character stats. Can be useful in tough battles to pad that out a bit.
- the main weapon drives your character's element, his ougi (special attack) and you can only use certain weapon types in the main slot depending on the job of your main character. The other weapons in the pool are just for stats and skills (increased attack, increased hp, increased double attack, etc)
New player
Your job as a new player is to collect the highest attack weapons you can find regardless of element or weapon skill. None of that means much to you at this point. You are strictly looking to fill 10 slots with high attack weapons. You probably have a few SR characters, maybe an SSR or two if you bought one or rerolled during legfest. Chances are they aren't all the same element. Fill that weapon pool with anything you have and get. Run events to get some shiny new SR weapons and maybe an SSR if you are real lucky.
Not quite as new. Reached rank 30
After awhile you have filled out that weapon pool with a mishmash of weapons based on their attack. Element is all over the place, rarity is a healthy mix of SR and maybe a character SSR or event SSR. Now you need to settle down and start thinking about working toward a single element. This will be based on characters you have. Find some strong SR or build around that SSR you pulled. Pick an element and start focusing on that. What does this mean? This means you need to start working on raids. Say your element is wind. What you need to do whenever you have 5 EP is hit that raid button and look for a tiamat omega raid. If you don't see one, try again in 5-10 min. When you spot one, be quick. It dies so fast you will barely have time to join the raid. Spam the button to join, pick any old friend summon. Don't think, no time. Pick whatever team you have selected and let it load. Once it loads, close that call for help window ASAP and spam attack. You may wile completely after that attack but who cares. You need to do damage or debuff the enemy to get credit. Doesn't matter if you are wiped. After doing that hit, you can hit the home button and when the raid finishes you will see it in the pending battles screen. Collect your rewards.
What rewards? Well you will get some rainbow weapons which are used to level up your real weapons. These are super helpful. You will get a quartz looking crystal which is used to create gold animas (more on that later). You might see a dragon scale for that element. Those are rare and useful later. Good stuff. You may get lucky and get the actual tiamat summon. That's good stuff. You want it and want it fully uncapped and leveled eventually. Short term it will only be useful as a stat boost but long term it will provide the backbone for your weapon pool.
The real prize is the weapons. You may get an SR weapon. These are great either as fodder for skilling up good weapons or as new additions to your growing weapon pool. If it has an attack skill attached to it, keep it, add it to your pool. Level it up, uncap it with subsequent SR weapons and skill it up to 4 or 5. You want to fill your weapon pool with these magna SR attack up weapons. The skill will add a percent damage increase to that element.
Now if you are super super lucky, you may get an SSR weapon from that raid. These are what you need. This is what you will be grinding for month after month after month. You want to eventually fill your weapon pool with 6-7 SSR magna attack up weapons. Some aren't going to be attack up (sadness) but can still be used for fodder to skill up.
To improve your chances at the good stuff, you need to host your own raids. Even if you can't do more than dent them, hosting gets you a red chest. Whereas the normal gold chest has about a 1% chance at a SSR weapon, red chest is closer to 10%. To host your own omega raids you need 3 gold animas of that type. I.E. 3 gold tiamat animas. To get those you need to farm the hard version of tiamat. You can do that through progression, killing the normal then you have access to the hard. Same rules apply as above, you get a red chest for hosting the hard and a red chest for MVPing it. You can get silver animas, gold animas or SR weapons. All good stuff. Silver you can turn into gold in the shop using the quartz crystals I talked about above and 3 silver animas. Work toward being able to solo the hard raids. You can do 3 of each type per day. Try to do them all. Get those animas and host your own omega raids.
There's a lot more to talk about. But it's all covered in the weapon optimization guide and the ultimate guide. By the time you reach rank 40-50, you'll know more than enough to make good use of those guides.
Personally I have reread them every couple weeks and gotten more out of it each time. I understand how it is daunting for complete newbies though so maybe this will help.
Btw. I typed this out on mobile. So excuse typos, weird auto corrects and brevity. I feel like a novel would barely be enough to fill in the early game knowledge gaps in Granblue.
Edit: added a little summary of what a weapon pool is at the top.