My pretty budget way to play Unchained
You can use unchained monsters passively (set one of the lower unchained monsters and let them spawn each other in the turn of the enemy) or aggressively ( attack the enemy multiple times. By using the quick effect of Rakea or Escape of the unchained you can destroy your monsters during Battle Phase for extra dmg).
After some iterations (also playing this deck as Evil Eye + Unchained), I can say this deck has reached a fairly balanced state. Going first or 2nd is completely valid.
Going first I try to end on I:P, Soul of Rage and Rakea. This allows me to activate the effect of I:P and chain Soul of Rage as CL2 right after a monster has been summoned by the opponent. Linking into a link 3 with a monster of the enemy and link into a link 4 (unchained abomination or avramax) with I:P. Rakea could now trigger abominations effect.
Elsewise the deck is built so that enemy bord destruction is allways possible.
Side deck is almost only for playing against backrow heavy decks.