I guess how viable this is depends on how you are planning to play the character (especially if it's a persistent char or a climbing set for 1-71 solo or in group).
In any case, the short answer is yes, given very good hybrid or medium/off-caster gear, it is very possible. However, you will do much better as a pure healer on a guardian (which can also tank, but not really do damage), or on a magician (which will be a pure caster, so naturally great at both dmg and healing, but can't tank and everything will take MP)--assuming that your wanting to use a rogue is because you're looking to make a good feeder type healer.
As an aside, the reason I chose rogue for Screened is mainly because I wanted to be able to detect trapdoors so I could finish catacombs mazes for maps before descending. Rogue is not naturally a great healer, but is naturally good dps for a feeder and can tank
I drank a
lot of int potions to be able to heal well