If you want more power stones to improve your statues then take them from your optional rewards (such as your daily and supply chests). Also do not destroy blackguard bases (when you get that option) as the most you can get from a destroyed blackguard (npc) base is 3 fragments whereas attacking and killing them gives you a significant CHANCE of more. To improve you CHANCE of getting more power stones you should have at the very least a power stone chance (psc) masterpiece. You should also make a point of doing warships and the mega crab as the rewards are significant. Join a task force and participate in their operations.
Do not ever put down blue or green statues if you are offensively minded no matter how good you think they are.
You should aim for 3 offensive masterpieces (gbe, troop damage and troop health), I advise a psc and resource reward masterpiece also. Masterpieces are harder to get and good masterpieces even harder to get but the worst masterpiece is better than the best guardian. You will easily get good guardians so don’t worry about replacing them with a masterpiece.
Many people focus on tanks and they are good for crab but I suggest developing either HZ (heavies and zookas) or RZCM (riflemen, zookas, cyroneers and medics although at your level you don’t have access to the cryoneers or medics yet). These combinations are very powerful, especially combined with smoke.
You would find great benefits in watching various Boomtubers to see how to improve your game, there are many very knowledgeable people willing to share their experiences and be receptive to their advice.
Trader tickets should only be used if you need the resources, don’t just spend them, yes your resources will be raided but the tickets will not be so think of them as an emergency bank same as your resource boat, do not click on the resource boat until you need resources as the resources build up daily and are not raided. Only attack when you need resources to build. Focus developing your heroes, some abilities are great while others are very limited, there is a wealth of information on this forum, I have said nothing that has not been said on this forum before so the search button is your friend 🙂 good luck 🍀 and feel free to ask questions on things you are not sure about.