This is where I tend to disagree. In hyper aggressive matches, you have to rely on both mana and action efficiency to help spike your damage as much as possible. Couple that with how much you have to spend in spellbook points, and you quickly have to find a good damage engine that both supports your school as well as dealing high amounts of damage quickly so that you can the opponent before your mana, and therefore your mage actions, simmer out.
Nothing in school for the druid points her to an effective hyper aggressive strategy. She has neither the brute melee force nor the powerful attack spells to really make an effective strike against the opponent. Which brings me to how she has effectively opened in all the games I have seen, which is a strong mana base supported by action efficiency in a slow, but effective, way. Even her mage abilites point to something more controlled, and tempo driven. She has the ability to go aggressive if need be, but that aggressive fire is short lived and saved best for the late game. This is where meditation amulet fits in. It's a four cost piece of equipment, that, yes, causes you to spend your full actions, but as you said, she has the first cheap spawnpoint able to cast almost anywhere on the board. She doesn't really even need her full actions to move or cast creatures, because those vines do the job, and do it well, for her. Couple that with the ability to shoot walls from anywhere, and you quickly have a powerful mage that can really effectively turtle. I say this from experience, and not theory, mind you, because while I have gotten lucky with an aggressive druid once or twice, she has nowhere near the strength of a tempo control druid.
As well, the druid seems to benefit from that mana a lot moreso than other mages that have nine channeling do. Those other mages have a real strength in active play, while the druid can be fairly reactive, and stay in the game. Considering that she can drop a battle forge and vine tree turn one (which is a strong play with the druid), cast meditation off the battle forge, and still have plenty of effective free actions left, she's not a bad target for mediation amulet at all. I'm not saying it's perfect, because there is not a single perfect strategy that exists in this game, but I am saying that it is strong, and it is effective. the druid has the fantastic capabilities that we have not seen yet in mages thus far, and that is the ability to not cast huge threats and still be a threat. That may sound confusing upon first reading, but it does ring true. She is has the ulitiy to deal almost any threat handed to her, and in fantastic ways, I might add.
But, these are just my thoughts on her, and her particular strengths.
