I think you get decomposition at low level so you can destroy wraiths in the shadow grove of the present. Then later in the past. And if you have someone semi tanky there are undead beneath Arkham and in the maus etc.
But equally you can easily handle Drow patrollers and the guard at the headwaters of voralia's tears.
Also on water your telluric surge hits hard even vs foes with no metal.
Basically nothing should be all that hard for you.