As you know, there is no pretty particular skill for the level 90 Savage, now here I collected 2 skills for you. If you know more, just post here to share with all the Cronous players. We will be happy to help you with buying Cronous cro. Hope you have a good time!
Avalanche
It is a great skill which shouts while you attack, and teleports you to the mob.
At level 1 it does +110% of your normal damage, the damage goes up by 5% every time you level it. It has a large AoE but it is a pretty slow attack. You can get the next level of avalanche every 5 levels. This has to change sometime or you will not be able to max it, but to get the 4th level you need to be level 105.
Berserker
Umm..it is pretty good. Starts off with +80% your final damage and increases 10% every time you increase its level. It has a large AoE and you do not have to click on mob to use it. The thing that makes berserker a good attack is it is a fast attack, does not cost much mp, and has large AoE. Attacks faster than Spin Attack and has AoE as large as Avalanche. You can get the next level of this attack every 5 levels, until level 100, and then it is every 3 levels.
Well, that is the 2 skills. If any other question, just post here. I hope you have fun!