Final Board
5 Country is incredibly strong right now, and this board fits together insanely well synergistically. If you hit everything 3 starred, this board can actually beat quite strong capped boards late game, which is impressive for a 3 cost reroll comp.
BE VERY CAREFUL ABOUT PLAYING THIS COMP WHEN CONTESTED. With the Headliner rules (you can't hit a headliner if half of the unit pool is gone), it's nearly impossible to hit when contested, so you often have to stabilize and hope the other player dies first if contested. Better to just play when it's uncontested.
Early Game
An early Country Tahm Kench chosen can carry you easily to level 7. Ideally you get an early Samira or Urgot so you can put items on them, but Katarina works well in the meantime and can hold any AP items (move to Vex later).
Mid Game
5 Country is an insane spike, play for that whenever possible. You want to amass a ton of gold before selling your Tahm Kench headliner on 7, since you often won't be able to move items off Samira to Samira headliner (same with Urgot), so you need to hit them 3 starred quickly after using the headliner.
