Passed this one on to the developers and we'll look at fixing that up, sorry about the delay in replying!
Heal every three or four blasts, so you would not need a power healer; healing often keeps stamina high and you get more points when your stamina is high.
Hi @Darkmix, and welcome to the Forums. This is not something we have planned for the immediate future but that doesn't mean we would rule it out.