This comp is a late game oriented team that revolves around the Invoker trait. This comp is able to output a lot of magic damage, but it will be hard to complete this comp as it uses a lot of high cost units in the end game. You will want to use Abomination along with Karma before you find Teemo and transition into the late game.
Go for this comp if you have a good start with Karma and a solid economy. You can also transition into this comp from a Dawnbringer Karma comp to reach a stronger late game.
Level up to 4 early if you want to start a win streak. Level up to 5 to try and continue the streak.
If you're weak in the early game, you can opt to save gold and lose streak instead.
At Round 2, level up to 6 regardless of your start. Put together the strongest team you can.
At Round 1, level up to 7. Roll down to stabilize your comp if you are weak. Afterward save up to hit level 8 and complete your comp.
In the early game, you can either start out looking for Dawnbringers to transition into Karma or use Abomination along with magic damage units.
Continue adding in stronger units while keeping a strong board. You can use Syndra or Soraka or Zyra as an item holder depending on who you find. You can also use this mid game to transition into Abomination units.
Since this comp uses the Invoker synergy, we prefer using Blue Buff on Karma instead of Spear of Shojin. Shojin will still be fine, so don't worry too much about that.
If you have extra mana items or magic damage items, you should itemize Teemo to become a secondary late game carry.