Nightfall final impossible with scorch

Gotta be a mod issue here...shaak takes like 3 turns before getting destroyed...scorch isn't the issue, your use of him might be (and mods). Don't use taunt until lv gets low health. Works just fine and is way easier with all the clones. I 3*d with just 2 so it's definitely doable, just need to wait for the stars to align, and get better mods.