The thing is, you must complete Lost Ark Gold all three rows before an ability stone becomes available. The chances of every attempt to add a facet is the name used when battle engravings are successful in activating the node, or crack, as it is after a negative engraving activates the node, are listed under the cost. Those odds go up after each failure to activate and then decrease with each successful. When the odds are high (in the range of 65-75 percent) you should try to align the engraving you consider your most valuable to. When they fall below the 25 percent or 30 percent range, test the negative engraving and see if it doesn't get excessive cracks. In between, try the engraving that's less helpful for you.
It may seem like a lot of hassle and the potential for negatives that could offset the benefits, however abilities stones can do more than just change the engravings. Each stone gives a massive boost to your vitality and that boost grows with the more effective aspects an ability stone offers. If you do not possess an ability stone, you'll be short on hit points for endgame activities.
What is the best way to select the perfect Lost Ark engravings
The number one choice should cheapest Lost Ark Gold be a class engraving that emphasizes your character. The Sorceress is an example. She could choose between Igniter to boost the value of her identity skill, or Reflux which blocks an identity skill's benefits, namely Arcane Rupture. In exchange, she gets more damage and lower cooldown for every other skill. If you're happy with your identity ability then go with Igniter but if don't use it the majority of the time, go with Reflux.