Can I Beat Awakening If Everyone Always Crits?

Fire Emblem Awakening on lunatic+ makes the enemies pretty strong, so I gave them all a 100% chance to crit to make them even stronger. To compensate for this, I also gave all of my units a 100% chance to crit. Making both my units and the enemy units way easier to kill, so I'm going to have to be extra careful to not die. The enemies lunatic+ skills are also going to make this run significantly more interesting, as if they have luna+ there almost certain to kill me in one attack; skills like aegis+ and pavise+ will make it almost impossible for me to one shot them, and since the enemy are dealing much more damage, vantage+ is also going to be pretty strong.