War Haven is a game all about building and customizing your own strategies. One of the unique ways we let players do this is by allowing you to set your army's battle formation at the beginning of each match. This may seem like a minor detail, but a well-set battle formation is often the lynch-pin in a successful strategy. Clever positioning can offset the randomness of the initial draw and help set your characters up for the tactical roles you need them to fill.
The ideal positioning for your characters has a lot to do with the way you set up your support deck. If you load a lot of support cards into your deck for a specific character, for instance, you probably don't want to put that character on the front lines. If that character dies too soon, you may end up wasting several draws on cards you can no longer play. It's a better idea to keep your most supported characters mid-party or at the back of your ranks until you have the cards you need for them. This both minimizes risk and helps set up a good defense system to rely on while you wait for cards.
Alternatively, you may want to put a fairly powerful character in your deck with no support cards to play on them. This character can immediately be moved up to an offensive position, forcing your opponent to react while you continue to set up your strategy unabated. When the character dies, this is no great loss for you as all of your support cards will still play and you've given yourself the benefit of more time to focus on drawing and improving your units' position. Your opponent, on the other hand, has had to concentrate on defending themselves and may have used support cards to deflect your attack or even lost a character of their own.
The diversity of your deck is something to strongly consider when choosing your characters' initial placement. If you have a lot of characters of different races and classes you are probably going to want to consider your placement more carefully, as there is likely to be much less interplay of support cards among your characters. If, on the other hand, your army comprises mostly characters from the same class or race, there may be a variety of different formations you'd want to consider.
The main guiding principle here is to consider each of your characters' strengths, weaknesses, access to and reliance on support cards when you set up your battle formation. Consider who you want to protect and who is most capable of protecting them, and try to avoid putting yourself in a situation where the initial draw is all-important to your strategy. If your army is well set-up on the first turn, you're already well on the way to victory.