I find it always works well to keep your line as long as it doesn't totally wreck your game. A line of units is formidable, and a cavalry charge can often get obliterated by any counterattack. I like using effective counterattacks, so I goad my opponent forward.
Bluffing is a great part of this game, and I will alwyas try to persuade my opponent that I have Line command, Double time, and Mounted charge all at once. I want him scared all the time :blink: Of course have you guys forgotten "Clash of Shields"? If you still have your lines, it is game over a lot of the time!
The thing about attacking immediately on your flank say, with all three cards, is you haven't gathered any Intel on your opponent's hand (I like to see what he's got too). You also reveal immediately that you have no game plan, and are just running out swinging.
The opening is the most crucial aspect of the game (this game is a lot closer to chess than most people realise). The correct opening card play is not simply to say "I got three flank left cards, so I'll charge the left" it is to ask yourself, after each play, what can I do to leave myself in the best possible position down the road, and leave him in the worst possible position?
Rushing out and grabbing three quick banners often doesn't win you the game if he can stabilise his position and mount a successful counteroffensive.
You also need to assess the enemy's fighting strength in key areas - cavalry (is Mounted charge a threat, and do I simply need to ignore it?) heavy infantry (in which case be sure to track the Line Commands if you're going to close with his heavies!) light troops (which need to be trapped in order to be killed quickly) etc.
Often it is necessary to make a "quiet" move, a subtle maneuvering of units to rapidly boost potential at a later time.
I try to position my units in such a way that ALL the cards I am holding become good. This is my ultimate goal.
Of course sometimes he hits with Darken the Skies, Double time and two Line commands at the start. Those games you just shrug and hope the dice are kinder to you than the cards were...