[Morkilus]

If you're going to build a strategy around a particular spell, it had better be something that accumulates and feeds back into the system. Ivy Kings to produce Vine Ogres can be such a strategy, since they produce an extra three Vine Ogres for each casting; it's quite a deal. You need to support them with other army-buffing spells since they have low protection, so it's good to focus on the Earth path as well as Nature. It can be difficult to get enough nature gems to get started, so be sure to pick a nation with good nature and earth mages so you can get your site-searching done quickly.