Pharaoh's Treasure Hunter Need Advice on Increasing Tier Upgrade Success Rate in Kingdom Hunter

I hope this message finds you well. I've been enjoying my time in the game, but I'm encountering some difficulties with the tier upgrade system. It seems like the success rate is quite low, and I've had multiple failed attempts. I was wondering if anyone else has experienced this and if you have any tips or strategies for increasing the chances of a successful tier upgrade.

I've tried different approaches, but so far, it's been a bit discouraging. I'd really appreciate any advice or insights from experienced players in the community. Your input could be a game-changer for me!