1) Train to get free health potions from weak monsters instead of buying them.
2) If you have surplus health potions (max 9), you can sell for extra funds.
3) Before fighting a boss, spend all gold to purchase gems as it gets expensive.
4) Distribute 1 point and +5% to your strength attribute, divide remainder in others.
5) Easiest way to win is survivability. Use Potions + Stun + Leech + Rage.
6) Adding points into speed reduces skill cooldown.