Welcome to 2moons-dil! Here is from other site that something about weapon in 2moons. We just give it a summary, hope it can drive your attention.
When it comes to Twin Blades the main Important Gems to use are Rhombuses and Poison % Damage Gems. At lower Levels(2moons gold) Rhombuses are they way to go. At Lower Levels + Damage Rhombuses are better because you can use all the Damage you can get, and at Lower Levels the % Damage Gems are useless if you have Low Damage.
We would Recommend Using + Damage Rhombuses for your Level(2moons dil) 60 Twin Blades and for all Lower Twin Blades if you happen to get any of them Slotted. For all Higher Twin Blades you really want to start Using Poison % Damage Gems. For your Level 66, 72, and 78 Twin Blades we would use at least 3-4% Poison Damage Gems in those Twin Blades.
For Level 85 Twin Blades and High you Really should be using 5% Poison Damage Gems (possibly 4% for those Level 85 Twin Blades but anything Higher should be 5%). At Higher Levels we know ever since 2moons started to suck, 5%s are hard to get, and now a days prices are high, but we still would recommend using 5%.
If you are wondering why we would use Poison Gems, its because some of Summoner's Attacks are Poison Based, and based on Buffs/De-Buffs the more Poison Damage the Better. When it comes down to what Gems to use in your Hybird Staffs we would recommend using +40 Magic Damage Gems, or +44s if you can get them or afford them.
Some people think it makes sense to use Poison % Damage Gems, but its really a waste when you think of it based on numbers. Having a % of a small number really doesn't give you much more Magic Damage, so its not worth using Poison % Damage Gems when you can directly add more Magic Damage from Gems.
Do you want to buy 2moons powerleveling service for your character. Here we can provide you with the cheapest price, if you place an order from us, you will share the fastest delivery.