Sidenote:
For all those who think faping is an easy job, you can do semi afk, I have to tell you, completely wrong.
Autouse tool is very bad, as if your customer is full health (when he evades or mob miss), the autouse is intercepted, next click will not come. This will kill your customer.
Clicking just on the healthbar, bad aswell. This causes unpredictable movements and turns that cost time and may lead to healing while movement. In case of ImpFAP this is only 30 HP and can kill your customer.
And there is a problem with some mobs, especially when your customer goes melee. Some mobs claws, tentacles, mandibles and whatever attack they have, go through the hunter, so it happens that you click on the mob and not the hunter, this can kill your customer very bad!
Solution is, don´t chat or do other things beside faping, always pay full attention.
Do manual aiming in first person, to avoid clicking on mob parts that go through your customers body when mob attacks.
Aim to parts that always is visible, often this is just the feet or the head, thats why you need manual aiming.
Optimize your timing, this can help your customer a lot. Useless to heal 0.1 HP when next hit will hurt him for 150+.
Always watch his healthbar.
Especially in teams, where you have multiple hunters to heal, its important to have the correct position to them, so you can switch very fast between them, every delay can kill one of them.
It needs concentration and focus to be a real good healer.
If you do a failure once in a 2 hour hunt, the customer normally don´t care that much, shit happens.
If you do 3+ failures an hour, your customer very likely will be pissed and never hire you again.
So for all starters who like to go into healer business, don´t do the above mentioned failures.