AOE Bombardment 3

The  number  of  Void Monsters  killed by the members of the Four Guilds had crossed the hundreds after five minutes of intense non-stop combat, and the members were greatly benefiting from it. 

Even the basic members of each of the four guilds had reached level 25. Meanwhile, those of the higher ranks were closing in on Draco and Riveting Night's level. 

It was inevitable that they would be surpassed - for now - as the Evil Duo were busy placing all their gained experience into their growth items. 

Riveting Night had only one, so she was making great strides to upgrade the Eye of Heaven, compared to Draco who put a little in Pair  Dadeni  and a little into Mjolnir. 

Why did Draco do something that seemed so counterintuitive? Shouldn't it be common sense to focus on one and send it to the next level before starting with another? 

What was up with this brainless act of spreading the experience around?