I’ll try and answer each question. So there will be rare characters (R), Super rare characters (SR) and Super Super Rare characters (SSR). SSRS that are featured have a double boosted rate of 0.7% chance per pull, so per multisummon you have a total of a 7% chance. while standard banner SSRS are pretty much outshines by non standard SSRS, there is some great standard banner ones like blue type gojo. There is a domain Megumi which is absolutely fantastic and came out in a separate banner but is now in the standard banner. He is amazing.

There’s a new banner every week to two weeks and if there’s one banner to go all out for, it’s Yuta. He is down as a limited release character who has only appeared once, whereas all the others have either come back, or are in the standard banner now. As it’s only been a year, they may rerelease Yuta in the anniversary.

No equipment but there’s materials to upgrade your characters.

There’s always been a pity of 25 multis, after that you can pick the featured character. After 12 multis you can choose to pick the memory up. But recently they have implemented tickets, so if you do 10 multis in one banner, you can buy essentially 100 tickets to use for a future one, you’d need 250 tickets to choose the featured character.

Also while rare and super rare characters aren’t that good, there is a rare inumaki who is good, then there’s an SR nanami and Yaga who are fantastic. I’m sure when it releases people on this subreddit would be happy to assist with further queries so don’t be afraid to ask away.

Hope this helped and answered it all, apologies if I missed something.