Heroes in a Sanctuary can make two attempts to Heal Corruption, whereas those who travel home can only make one attempt
From The One Ring (p198):
Heroes reduce their current Shadow rating attempting a
Craft or a Song roll with TN 14. On a successful roll, they
reduce their [Shadow rating]
From this, it is clear that "a roll" == "an attempt&...
Have two levels of fighter.
2nd level fighters have action surge which grants them a second action. Noting the rules explained in this question and answer, if you use action surge after casting a leveled spell with a casting time of 1 action, you may cast another leveled spell with a casting time of 1 action as long as you have not used you bonus action to ...
Healing others as a bonus action (since you already spent your action casting) without spells seem fairly rare. Here are some examples I could find, though none are Cleric features unfortunately:
Oath of the Crown Paladin's Turn the Tide:
As a bonus action, you can bolster injured creatures with your Channel Divinity. Each creature of your ...
Healing Spells are at least first level, so you cannot use those
You cannot use healing word because it is not a cantrip. The paladins aura of healing heals as a bonus action - no casting in the same turn necessary, but unfortunately, it requires concentration which you need for beacon of hope. There are no healing Cantrips.
Potion house rule
I heard, some ...
I won't build the entire character for you, but I can make a couple of recommendations to improve the druid to excel at what you are wanting to do.
The standard druid spell list will have you mostly covered, but since your DM is permitting small borrowing from other spell lists, I would recommend suggesting your DM allow you to take some of the following ...
The core druid spells ought to have you covered for this.
By level five you could take:
Shillelagh / Produce Flame / Primal Savagery
Wind Wall or Wall of Water
Call Lightening or Protection from Energy
Since the optional rule for the short rest came after the rule saying that they regain all hit dice on a long rest, I'd assume that it's implied that they only regain the 1/4th at the end, after they've spent the rest.