I unlocked magicites and hit a brick wall.
Guess my FF7 earth and fire teams aren't carrying me past this. I'm pretty happy they got me this far though.
You can search the boss name and "FFRK Reddit Mastery" for a thread with sample teams and a link to the boss AI. Most Magicite have a gimmick to play around.
Generally you want 2 ways to boost the attack of your team to deal damage:
What we call "Gen 2 Chains" give a 50% attack or magic boost AND a flat boost to the element increaded by the number of hits on the chain upto 150. That'll do everything you want in one Soul Break.
"Gen 1 Chains" only go up to 99 and don't usually have the 50% Attack/Magic boost. You'll want to pair it with either a Soul Break which gives a 50% boost (Onion Knight has the best ones in the Anima Lens shop) or a Soul Break/Ability which casts Imperil on the boss in the element you are using.
If you don't have a chain, a max Imperil stack (6) and the 50% boosts can do the job. I cleared the 5* Ice bosses without a chain for example.
You also want your characters to have a weapon and armour that boosts the element they are using. It may take time to get these as a new player, but most of us didn't have a full set on the early Magicite bosses. Artifacts can be bought which have these boosts, get the element artifacts and not the realm artifacts.
For defences, Magicite have an auto Wall cast by Dr Mog, so you just need to bring two things:
Protega and/or Shellga if the boss uses physical and/or magic damage, though many attacks on the harder bosses can ignore your defences.
Medium elemental resist accessories on every fight. Your healer can use the Large resists you get from the Nightmare bosses before Magicite, the others come from events and some are in the Gyshal Greens shop, this may also take time.
3* Magicite you should be able to beat missing quite a few of the damage things I mentioned above, I beat them all with Cloud, his damage cap breaking USB and a non elemental ability. It's probably possible to power creep them with 6* abilities.
4* Magicite you need a solid team with Ultra Soul Breaks at least, most of the above and knowledge of the boss AI for the gimmicks.
5* Magicite you also need damage cap breaking Soul Breaks/Abilities, and a seperate physical and magical team for each element.
6* Magicite I can't beat yet, you need a perfect team with a gen 2 chain, multiple Awakening Soul Breaks/Glint Soul Breaks or a Sync Soul Break.