Download SinBotv2.3
Level up to 8 and unlock Decisive Battle
Bot Decisive Battle to 20.
Unlock Dethrone the White Tyrant.
Bot DtWT to 36.
Bot White Tyrant's Challenge to 40.
Do Pact: storyline quests for transformation.
Unlock Nightmare at the Ruins.
Bot Nightmare at the ruins until 57-59
From there, bot on Contact/Buried Sorrow or any of the other Fomorian Base battles to 70.