In the right go-wide deck, such as Elves or Goblins, you can easily get boosts in the +4/+4 to +5+5 range going, too, which are very hard to deal with
"It's like deja vu all over again." - Yogi Berra Bottom Line: Know what cards are in your deck & sequence your lands properly Study your deck, and if you are short on time, just make sure you pay particular attention to cards you will want to play on the early turns of the game
The enchanted player won't gain life, but any other effects of that spell or ability will still happen
Any effects that say that the Human can't attack (such as that of Propaganda, or if you get a Human with defender) affect only the declaration of attackers
Hakbal lets all your Merfolk creatures Explore at the start of your combat step, and then when it attacks, you get to add a land from your hand into play, drawing a card if you cant