Ok, i'm in a campaign with a few friends and it looks like the end may end up being me the druid vs the wizard. the others will probably be dead by the end. It may not come to this, but I would like to know strengths and weaknesses of wizards and a good way to beat them as a druid. Thanks
Get up close and maul them to death.
Well, the strength of the wizard is that, given time, she can do anything, including stockpiling wish spells from an army of enslaved outsiders in the basement.
The weakness of the wizard is that she needs time to do that, and she needs information to know what best to do. She will also not do well in a physical confrontation.
So, your task will be to deprive her of any information she can use to develop countermeasures, control the tempo of the encounter so that she is forced to improvise instead of using plans, and overwhelm her with brute force.
It would help if we know what the wizard's specialization/archetypes are, what spells they like to use, notable items etc. Wizard tactics can vary hugely. I was going to suggest Dire Tiger grapple as a strategy that utterly wrecks a wizard who hasn't prepared for it and hasn't tossed up Mirror Image, but if the wizard has the tools to defeat it (teleportation subschool) then it's almost useless.
Need more details.
Character level, build. We need to know your capability before we can give you advice.
What level? As an earth elemental I've effectively use earth glide to get close to them or hide from them until their spells wear off. In general and wizards don't like to be grappled (as snowblind suggested) and they usually have weak fortitude saves any thing you can do to exploit these weakness would be helpful. I haven't played a Druid in over a year let me look at the spell list and refresh my memory but I believe you are better of buffing yourself and animal companions.
The key to taking out a wizard as a druid is being able to choose when and where the battle takes place. Don’t allow him to choose the battle ground. If you have to go into his lair you are at a severe disadvantage. If the wizard has a chance to prepare and get his defenses up you are in trouble.
You probably will not be able to lure him into attacking you, but at least get him out of his tower and unprepared. Figure out a way to get him to travel somewhere where you know he will be. Even if he uses teleport or other magical means of transportation he will still be leaving behind a lot of defenses.
Setup a two pronged ambush. The first part of the ambush is setting up a decoy encounter for him. If he is traveling to a town have him attacked when he gets there. Maybe use some summoned creatures for this. Let him win this encounter and in doing so burn up some of his resources. He will probably cast spells with a limited duration at the beginning of the battle. After he blows your minions out of the water he is probably going to stick around to see what is going on. During this time simply watch in the form of an animal that will not be noticed.
After his spells have run down, or are beginning to then hit him with the second wave. Again start off with some minions and let him waste more of his attack spells. Then when he is engaged with the summoned creatures hit him hard.
Keep in mind that you have access to every druid spell in the any of the books. He on the other hand only has access to every spell in his spell book. If you can figure out what type of spells he has you are at a major advantage. For example if he uses fireball then you can prepare resist energy for fire. Prepare spells that target his weakest save.
Use wild shape to stay away from him. Have a call lightning spell running when you attack him use it to disrupt him from casting spells. Entangle is also a good spell to cast early. If you precast call lighting and then let him attack your summoned creature first you could hold action until he casts and then hit him with lighting every time he tries to cast.