Poison . Max -epr on gear. 1 PT revives for meat shields, 1pt lower resist, 1pt amp, max ce and nova synergies (bone armor synergy last)
Infinity merxlc, insight golem.
Tele, lower resist, nova, amp, ce, repeat.
Depending on area mobs, lower resist maybe unecessary, go straight to amp for Merc first kill then cececece = screen cleared.
Summoner is only better if you want to do ubers. Otherwise requires way more gear, and less fun playstyle (personal preference). Note, summoner probably has edge vs bosses. Decrep + infinity merc + revives do alright, but the psn dmg isn't good vs bosses.