Ward of Dawn underpowered you say? Not when I can pop a bubble then proceed to 1 body shot anyone I encounter with my sniper rifle. I can't be the only one that's using this. Add the glasshouse and you can even leave your bubble and find a few people then come back to refresh. Offensive bubble > defensive bubble ;)
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When it can be done yes. 98% of the time someone supers me before I get to use the benefits.