The effect of avenging storm (not the bolts) is an attack against yourself, like most of self cast buff.. Moonwell or Consecrated Ground make on yourself a roll per 3sec, Pollen Patch per 0.3s.
That work very well with the freeze lash of the corn of the Auroch, or the ring of clenched muscles, but also some other stuffs like :
Regrowing (Fleshmender), you are going to loose the AR bonus on each hit from buff,
No Fool, I, Gipon Prudensco, you gain the bonus very fast with pollen patch for exemple,
Dug In, Wahai Pogara (the speed bonus),
and Entropy Shield from the Chromoprismatic staff (the damage reduction).
And maybe also some other things from dlc..