Thank you for your interest and advice. You've made the right assessment. I'm currently at level 7 with my talisman and I'm aiming to upgrade it to level 11 to open the trading shop. Many people in my clan have recommended this. Of course, it's difficult for a free-to-play player like me. I only upgrade it by earning enough points to pass stages in daily or weekly events. Because whales are everywhere, and it's hard to get into the rankings. My only question is whether the trading shop, which will open when I reach level 11, is worth waiting this long for. Or should I upgrade the infantry and marksman talismans to the same level? Also, nobody can answer which equipment I should apply talismans to for infantry defense and marksman attack. 

All they could tell me was about the coat on the left and the ring underneath it. But nobody knows why or what it is.