Crossblades is supposed to buff Fortuna's Grace to boost the damage for double attacks.
There are a lot of good items to make faster with Crossblades.
Shelly for Healing, Carrot for Empower and Flute for Luck → Crit and Shield.
Double Acorn Collar is important to crit as soon as possible.
Use Strong Heroic Potions for Stamina.
You really want to get 1 or 2 Moon Shields so you have good defense but you'll generate a lot of Mana aswell to trigger the bonus effect of Mana Orb.
Lucky Piggys can boost the percentage of many Items like Moon Shield, Cap of Discomfort, Stone Helm, Carrots and Piercing Arrow.