For Addictive Drums, there was a
nice post made by Subjacent last year which includes track templates and drum maps. If you begin to use AD to any significant level, the content of that post will come in handy.
Nectar Elements unto itself is a fairly powerful plug-in. With the extras included with X3 Producer, the "gap" to Nectar 2, can be closed with an effects chain for the most part. Nectar 2 (Standard Edition) has more internal effects, which makes it a "one stop shop" in a way for a vocal track. Over time I have tweaked this enough to have saved presets based on the mic I am using that makes it a quick start point for mixing.
The extras that are included with "Nectar 2 (Production Suite)," namely the "breath control" and "pitch editor," I do
not use nor find useful. Melodyne is easier to use and more capable than the pitch editor, and the breath control didn't seem to have much usefulness to me.
For the work you are doing, I would recommend following up with Nectar Elements and potentially upgrading to Nectar 2 (Standard Edition) from there. The sales that run around Christmas are usually pretty extensive, and the cheapest upgrade price is sometimes through third party retailers (online) rather than iZotope's website itself. Cclarry often has timely posts in the software forums on software deals as they arise.