Nearly all the accessory scrolls cost a lot though. That and the choice is very limited.
http://vindictusdb.com/enchants?cat=ACCESSORY
From this list, we can eliminate the following right away.
Warlord, Healthy, Passion
These are all primarily Def stacking options. While they do give minor boosts to other areas, their price tags aren't due to that. Simply put, unless you want to be a Plate Evie, ignore these as they just aren't cost effective.
That leaves you with 3 Prefix options and 1 Suffix option.
Suffix - Berserker
Sadly, stacking 5 of these only gives you the stamina regen of one and only 150 M.Att. For the risk and the cost, it's not very effective. It's still your best option aside from Passion, which offers you more stamina to Magic Arrow spam.
Prefix - Strong, Significant, Fast
Here's where things get somewhat interesting.
Fast is going to completely ruin your balance if you stack it. As stated already, that's likely going to cause you to not actually gain that much DPS. This is even more jarring as Staff Evie is one of the classes that gets the least benefit from stacking Attack Speed. It's a really iffy choice and really not necessary for Staff Evie to perform well.
Strong is a fairly cheap option. It offers you 2 Stamina and 9 Int. It's very minor, but it's something. 10 Stamina and 45 Int is noticeable enough if you stack 5. Considering these can get 100% success and only cost ~3m per scroll, it's really good for a budget scroll.
Significant offers 1 Attack Speed and 15 M.Att, about the same damage boost as a Strong. It also costs way more (as what I talked about in Fast still applies). The question is if 1 Speed is better than 2 Stam, and if the price difference is warranted. For Evie, I honestly say no it isn't. However, if you really like speed, I'd go for Significant instead of Fast.
Also, a bit late. But Sakraycore, try to create a new topic in "Question and Help" in the future. This is getting really offtopic as the conversation is no longer about the Dragon Update.