If you're not down to magnetize it, then I'd recommend another TLA. It would likely offer the most utility, as well as let you take LotC if you're running a Gnarlroot grove. The vanilla TL is worth a look though, as it's 50% cheaper and offers a decent source of damage, wounds, and distraction. The Durthu is, I think, the least helpful option, but I'm also not the most experienced player, so it's worth it to get more opinions.
Also, does anyone have a dryad-heavy or Drycha list that works? I'd like to field 70 just to be able to, and it is only 640 points, but it seems unreliable.