Exploiting Weakness and Resistance is perhaps the most direct way to gain a combat advantage
What do you think of the Mind Flayarrs precon
Crewing Vehicles will leave you with a lot of tapped creatures, so permanents that untap your permanents are especially useful
Legendary Creature - Human Knight Anim Pakal, Thousandth Moon Whenever you attack with one or more non-Gnome creatures, put a +1/+1 counter on Anim Pakal, then create X 1/1 colorless Gnome artifact creature tokens that are tapped and attacking, where X is the number of +1/+1 counters on Anim Pakal
The full texts of these abilities are "At the beginning of the monarch's end step, that player draws a card" and "Whenever a creature deals combat damage to the monarch, its controller becomes the monarch." If the triggered ability that causes the monarch to draw a card goes on the stack and a different player becomes the monarch before that ability resolves, the first player will still draw the card