Necro items that change gameplay at low level.

[Veleria]

I recently got to level 25 on my necro and was not seeing many items the felt impactful. 10 more hp or mana is good don't get me wrong but they don't feel like they impact how I play the character just nudge the downtime calculation up or down by small percentages. I was wondering if there are any Items I should look into that have an effect how the class plays. I know about CoS but that will not be in my reach for a very long time if ever. Are there any other items that impact the way we play. Clickies that cast useful spells for example.