You know, mitofrogs are also easily blocked by DR shields.
Just a note; guys, please stop saying the "What?! You play rush without Adrenaline?! Wtf?!" thing. Life doesn't need Adrenaline to rush hard. Adrenafrogs are as fragile as they are powerful and easily blockable by DR shields. There are other types of rush which are overall more reliable in PvP, though somewhat slower.