this is why i'm glad some floors have lowered difficulty. it'd be a different story if you had to deal with high HP mobs all the time.
definitely need to take advantage of the fact that you deal with tens of thousands of HP at first, then start facing millions later on...
Having the Key Blade Solomon Weapon for every element will greatly help with the lower floors and beating them quickly without the need for many or any Kami. You only need 1 copy of it, no need to MLB.
One of the early strategies that I read from DMM for tower was to hit the early floors on day 4, then wait 3 days for all your teams to CD, then proceed to the higher floors. with your strong teams on the last day... It was something like that. I don't remember all of the specifics.
each floor requires a key to be used, with only 7 days since they decided to launch on december 3 we can only reach floor 14 if you win them all
i checked all the floors they only require you to enter once
but still each floor requires a key so full clear is no option
i expected to be able to use a key to enter and reach floor 7 with 1 team not this 1 key per floor bs.....
you miscounted cause it's supposed to be 8 login days. the last day of an event usually doesn't get a full 24 hours though. it's the 3rd to the 10th really, making 8 days as in 16 keys.
also, you to clear floor 15 twice if you want to do all the missions... meaning you can't fail a run EVEN ONCE for full completion... so no mistakes if you wanna do all 45 missions.