Tips and Tricks
It doesn’t really matter in what order you build up your base at first, but you should always have your builders do something.
Start with placing the resource producing buildings first, then start upgrading what you already have. Is's a classic upgrade resource buildings first, weapons second kind of game.
When you reach level 5 and your protection expires, you should already have the T1 Python upgraded to level 2 or 3 and 7 of them trained. This is the minimum I would recommend to go to battle with so start attacking other players.
Three Pythons should be considered enough for 1 Machine Gun, four or five should be enough for two machine guns etc.
Always use the targeting option to focus fire.
The Hexium Extractor should be your primary source of upgrading because that is the resource that you will need the most: for training troops, for upgrading and researching.
Keep your defensive turrets protected by walls and keep in mind walls are only useful if there’s enough distance between them and what you’re trying to protect.
Focus your attacks on resource generating buildings. A quick strike to those guarantees resources even if you lose the battle.
Take the defensive buildings down one by one, instead of randomly shooting at them with few troops. Group, attack, regroup, attack again.
Have at least two defensive buildings together shooting at invaders as soon as they’re in range.