I can give some advices too... I have no luck (here in Conquer Club) but have some strategies.
1- Cards are good, but dont waste your armies; if your first rolls are losses, end attacks. Never attack without the advantage of 3 x 2 dice, unless its really really necessary (to kill an opponent, for example).
2- Try to keep your enemies interests away from your areas. Remember, they will not try if they think its impossible. For example, if you start with 3 countries in Europe, player 2 with 2 countries, and 1 country to each other player, try take one of player 2 countries at first, or he can think about deploy in Europe and fight for it.
3- Never, never do a corrosive war against other player (the example about two guys trying Oceania is classic: none will win, and other players will grow). Try to keep a forgotten continent, or try some alliances if it can help you. You also can use my advice #2
4- You shouldnt even try a continent you cant hold, or you will become a primary target and will lose a great number of troops. Always try to expand in a way to decrease the number of your borders.
5- Dont superestimate your armies. You should always count armies lost to minimal occupation before a great attack. Minimal occupation can do a really great difference. Be realistic about some losses, too. And always count your enemies next deployments as if they are on board already (unless you are thinking about kill your enemy
).
6- In team games, team strategy is a must have. Deploying armies to your partner and fortifying him as necessary is the difference between two guys and a real double. A team needs always have an objective, so both players should help each other. Never let your partner die, and never offer his head to the enemies, one opportunity is all they need.
I will post some other strategies when I remember... Did you like these?