Most books I build have a specific plan in mind for most matchups, and often that plan is: play all 4 copies of Xyzzy, then finish winning by hitting the foe with the biggest rock I can find. I tend to prefer strategic play to tactical play, so I try to make sure I go into combat with a plan.
Dropping the max # of cards makes it harder to implement a strategy, and shifts the game more toward tactics.
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Speaking of which, there are lots and lots of strategy articles, but precious few on tactics. What gives?