How Eula Burst Works?

Eula's Elemental Burst is “Glacial Illumination” which sees her attacking foes with Cryo damage and creating a Lightfall Sword. Dealing damage will charge the latter which explodes after seven seconds. It also has the benefit of further increasing interrupt resistance.

Is Eula a good DPS?

Eula is an excellent Physical DPS that can spread Cryo making it easy to deal Superconduct debuff to enemies creating an even higher Physical DMG.

How many stacks can you get on EULA?

To put it simply, at 7s duration every hit of eula's attack is counted as stack. with max 30 stacks.