Share my experience on Kal Online
kal geons has great help for us, and we can gather it for our ability. I think we can control it for some space, we can also do well when we try our best to obey it, and the most important part is that we can like it and work out it.
We must learn skills to earn kal online geons for our character. You may want to consider becoming an offensive mage if your main goal is to support others.
Lightning mages can help a party out and make kal money by killing things before they do a lot of damage, and can still heal effectively. Fire or Ice mages are much more useful than healers in guild wars, and every build has the ability to learn speed/revive two support skills that are pretty much essential for every mage.
Generally, you will have enough skill points and kal gold to just about max out two skill trees by level 2. Most healers go for heal or lightning; this is because lightning starts with a free skill point, and it does high damage to begin with. In fact, you could say that lightning's main weakness is high mana cost rather than kal online gold. Healers have lots of mana, and do not do very much damage. Two plus two is four, folks.
My Lightning Blow which is advanced lightning attack was left at level 7. This conserves mana, and lets me pull enemies without accumulating many hostility points and cheap kal geons. It is not like I am attacking very much anyways. I found out the hard way that Lightning Mastery (extra maximum damage) is pretty much a bust if you do not max it, making it an all or nothing skill. Remember that it does not work on Shockwave (close range lightning attack, very strong).
It is a moot point anyways. As I mentioned above, you will have enough skill points and kal online money to get low priority skills anyways. I maxed out Cure 2 by level 41, and Restore or Group Cure do not unlock simultaneously with other skills.
So you will finish the healing skill tree with lots of skill points to spare. You will not hard to make money and buy kal gold.