1) Is there any other expansions with arena tiles
2) Are their enough tiles to build a larger board that can play 2v2 team games or 4v4 free for all.. if not can I just use two sets of this expansion together.
3) I own Mage Wars (original) plus both Core Boxes and teh Force Commander box... is there any others you would recommend?
2) Yes, and Yes.
3) Honestly one of each expansion, they all have excellent content. Druid vs Necromancer would be my first stop though.