Since tools lose "health" or durability each time they hit a block, a useful strategy is to in your inventory grid before a drop to ensure you cover as many blocks as possible, maximizing your resource collection before they break. Unlocked Max Level Pickaxe in Merge & Dig!
A skill that creates a rotating blade around your digger, protecting it and dealing extra damage to nearby blocks. 4. Strategic Placement Merge and Dig Hack
Instead of just merging tools, focus on upgrading which provide permanent gameplay buffs: Gold Rush: Gives a chance for double earnings while mining. Since tools lose "health" or durability each time
Increases the effectiveness of your tools against high-strength blocks. Automatically combines two identical
Automatically combines two identical, lower-level tools (like pickaxes) into a stronger version as soon as they are available. This is a massive time-saver, though in some versions, you may need to manually toggle it off and on to "kickstart" the process.
Equipping specific skills can help you clear difficult "wall" blocks: