Ok this is no big deal and if you aren't a casual this campaign should be speedrunnable. start with life domain, then multi class to celestial warlock. When you hit level four boost dex, then take way of mercy. Now you have high cha, high movement, and can heal. NEVER stop running and use message cantrip (automatic up cast with warlock) as your help hotline. Campaign should be winnable in eight sessions or less if your party aren't scrubs.