How to Save Your Gold
You should always try and preserve your gold, especially if you are a free player. You should not waste it on things like accelerating breeding process or compound building. Save them up and go for these:
Breeding Center Upgrade(500 Gold) : It cuts your breeding time by 50% at level 2
Incubator Upgrade(200 Gold) : It gives you an extra spot for incubating, which is very beneficial.
Buy a Gold Mutant(1000-2000 Gold) : In case you have saved every gold from awards and also leveling up, this is achievable and will give you a big advantage over your PvP opponents at low levels
Play the MGG Slots by Winning Jackpot Tokens
Jackpot tokens can be won by you doing the bi-weekly PvE event. That will help kick start your journey to getting powerful mutants and also more gold.
Build More Zoomorph, Galactic and Mythic Compounds
It can you hold more gold, so giving you more credits while you are away. They give max 30,000, 80,000 and 160,000 when fully upgraded. Make sure to breed more bronze mutants that are suitable in these compounds such as Honey Bunny, Beetle Bot, Bounty Bug or Nebulon etc.
In PvP, you should ask only for high level friends for defense tags.
In case you are low level, this will help swing the battle in your favor.
You should always try and get to the experts league in PvP to get the bonus PvP mutant.
PvP mutants have 10% bonus to health and attack just like Zodiac and Legendary mutants. They also have way shorter breeding times compared to most normal mutants.
Breed PvP mutants together for a faster breeding time
In case you were wondering about breeding times, PvP mutants have very short breeding times(2-3 hours). This makes them ideal for breeding other mutants. The only problem is that you have less chances of getting the desired mutant you want.
Do the campaign as much as you can.
This will help you gain significant amounts of gold in certain stages. Shoreline Shanghai of each division will award lots of credits once completed. Use the credits to upgrade your evolution chamber.
Benefits of more friends
More friends = more tags, more campaign passes and free gifts. Your high level friends can also assist you win tough campaigns with a strong tag team attack.