4. Talent point allocation is very important. Put 100 points into arrows to unlock Mastery upgrades to increase super crit chance, then put other points into Critical Damage. After you reach 200, reset and put 200 points to unlock 2 stars in Arrow Mastery, and so on. There's no need to increase Crit Chance because we only care about super crits.
5. Mastery upgrades you bought with diamonds are cleared when you reborn, which is very stupid.
Finally, it took me around 10 days to complete this game. There are many design flaws, but if you are aiming for the hard badge, here are some tips:
1. Use an auto clicker can help in the early stages, but click damage has very weak growth, so don't expect much. As enemy defenses increase, click damage will become useless.
2. Don't use lasers. They gradually become ineffective. Use arrows and missiles instead.
3. The only useful legendary item is the Diamond Arrows dropped by the second boss, which provide a 10% super crit chance and a 1.5 damage multiplier. You'll need to farm them repeatedly.
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 "Kana Warrior / かなウォリアー"){kind=icon}
 "That Pokeyman Thing Your Grandkids Are Into"){kind=icon}
 "Cursed Treasure: Don't Touch My Gems!"){kind=icon}