Strategic tips:
1) When attacking a player who is online, do not end the attack prematurely; keep the clock running for the full 5 minutes. This can help frustrate the opponent.
2) When using a 15 minute XP boost, attack Factions (PvE) about half the current level. When the experience bar reaches maximum, end the battle and re-attack. This can help accelerate level gains to a rate of about 100 levels in one 15 minute boost.
3) When given the opportunity to spend a Cerulean core, choose offensive structure upgrades such as warp gates, tech lab, fleet academy, generals quarters, etc.
4) Be cautious with Battle Cruisers on higher level bases. They can get wiped out easily.
5) Always keep queues full: buildings upgrading and troops training.
"The only reason for time is so that everything doesn't happen at once." -Albert Einstein