I've oneshot tons of mobs with the electric ball... priests lvl fine solo very fast actually :/
Lv60 priest singing in ~ I don't know what your doing as a priest that you feel your DPS is anything but more than sufficient. Lvl'd to 60 predominantly alone excluded instances. No issue with DPS what so ever, if your using a good Enigmatic weapon with % + Normal monster additional stats it helps a lot as it's the most common Mob size. Crystals could help you aswell but I never bothered, ran around with mana regen till the end lol and no probs. Might just be a skill cycle your not making most of your DPS work for you OR your talking about Priest DPS within an Instance which is completely different to that Solo'ing massive nerf on DPS inside and instance which sucksssssssss but you get used to after awhile and even after 60 and the bosses are more difficult you and freely DPS and Heal at the same time and actually feel you've accomplished something.
This is typical Korean design MMO. Everyone has their job, and does it well, or people die. Serious business and all. personally, I love it. L2 was awesome, played it for four years. wow was a joke, played it for a week.
So, Lancer and Priest are made for instances and parties, and don't level as well on their own. That's as intended. In the old days, in other games, healers had to be in a party all the time, because they didn't have damage spells or skills. Imagine that.
And yet, it takes half an hour to find a full party. What gives? Well, it's because the Lancers and priests are soloing to 60. Because it's a Korean-made MMO being played in North America. :) Good times.
A priest can solo everything else that other classes can it just takes a bit longer because we arent damage batteries and out toolbox for killing is limited to a few skills. Just read the priest guide Luciferia did a really good job explaining how to make [filtered] dead as a priest.