Disagree on the single dissolve. That card is wayyyyyyyy too good in druid to not to have at least four of. You lose an action, a card, and mana, yes, but you recover that in spades when you destroy countless pieces of equipment contingent on the strategy of the mages book! As well, it's only 4 spellpoints for four of them. One thing I absolutely love about the druid are all the cards she is supposed to have are really cheap, so you can afford a lot of sugrings, acid balls, dissolves, and geysers. You are probably going to need them, anyways. Druid functions as a support mage, lacking in any real physical or magical traits, she has the incredible able to throw vines, which will make your animal creatures that much more effective on the battlefield. You have enough ways to get free actions that you feasibly feed Kralathor for a few rounds to buff him beyond belief, and go to town supporting that beat stick. When comparing mages, I liken the Druid much more to the priestess, as seen in the Core Box. None of the winning priestess builds were solo or particularly aggressive (sans DivineNecrop as it was really fringe, often winning the first couple of games against inexperience, but relatively weak for tourny play (didn't stop me)). How she functions best is in support, and she has a wealth of spellbook points to defend her army with. From bloodspine wall + snatch, and various other incredibly interesting combos, she is also incredibly tactical, which is not even mentioning the tactical accuracy it takes to place and cast from vine tokens.
And I know there are those of saying: But the beastmaster can cast deathfangs from the lair and support them with reassemble! The pet cemetery deck isn't quite there yet, but we will see rise to it someday. No, today, we are talking about the Druid. Specifically, a card we know and have tried unsuccessfuly to use along time ago, Fellela. This chick wasn't very good in beastmaster, who is naturally much more aggressive, but the druid, oh man, the druid. An incredible play with her is round one felella, Harmonize. The next round we can cast vine tree and have HER Cast harmonize on it, and then can cast battle forge+ Meditation. The next round can be spent casting a druid ring from the forge, casting harm on battleforge with Fellela, and finally using amulet to gain three mana, so you are now at 10 mana for the round. Finally, cast vine tree into your start zone, and then treebond that shit. You are set with effectively 5 actions a turn, channeling a million mana. Please note that I am not saying this is greatest against a hyper aggressive opponent.
You could also try something a flying army, Gravikor, and a field of mines waiting to burst tanglvines, Snatchers, and walls at you? Sounds like a good plan to me. I would also try out the gorilla as a means to guard your sacred Tree of Awesome. and then teleporting him in to do some real damage. Circle of Lightning may be a good addition too, as well as a pacify or two. A circle of fire if you have enough spellpoints, as CoF is your single best protection against the undead.
Also, abuse healing, which you can really do with treebond. You are effectively healing 4 for that exchange. Include a hand and Renewing spring, and you are healing for a million. Worried about corrode? Cantrip chain barkskins.
As you've seen from all these strategies, support is the main aspect of her core, and where she fits best.
In anycase, I would love to see more talk of the Druid!