The Armoured Titan (Attack On Titan) mixed with One For All (My Hero)
Your Thoughts?
My Thoughts: This would basically boost all the attributes of the Titan form to stupid levels, being able to lay waste to city blocks within minutes, have unbreakable armour with skin so hard to get through that it would be like you trying to use a butterknife on a steel block.
The movement speed decrease of the armour would be all but negated or removed, allowing the Titan to move with such speed and might that it would seem like it didn't have armour on, to begin with.
You wouldn't need to hold back as in the unlikelihood that One For All does damage to the Titan form, it would be buffing it's already insane healing power, allowing it to keep going for days without needing to exit the titan, if even ever needing to exit it.