As you probably already know, Vincents and Alpha Vincents are facebook monsters found under the guild, guild monsters tab on facebook. Both monsters are a great way to level up a class and get some good drops.
Vincent takes 200 energy to summon, Alpha Vincent takes 400 energy to summon. Each click towards the summon monster button will contribute 20 energy and give you some gold and experience.
If you are planning to summon one, please inform the guild (or me) before you spend the final 20 energy needed to summon the monster. The reason I ask this is that unlike most class monsters, facebook guild monsters predetermines the class you will be using for the monster based on the current guild class you have equipped. There will be some members that want to change classes for Vincent/Alpha Vincent and letting us/me know before you summon will give them the opportunity to do so. Immediately after the monster is summoned, please remember to change back to your primary guild battle class or else you will have the wrong class for the next guild battle!
Vincent is meant for lower level players and most people with around 100 attack or defense will be able to get a victory against him. Alpha Vincent is harder and it is recommended that you have attack and/or defense that add to at least 450 before you tackle him (I think it takes around 500 effective attack to get a victory, and equipment will add to this).
On normal Vincent, it is recommended that you do around 100k damage to guarantee 2 epic drops, and have the potential for 3 epic drops. I know there is the possibility of getting 2 epics with just 30k or 40k damage though. On Alpha Vincent you will need around 180k to get guaranteed 3 epic drops, and 310k to get a guaranteed legendary drop.
If you are hunting Vincent or Alpha Vincent to get drops, it is recommended that you enter as a rogue since you will have the class damage bonus applied. Use Deshara (if you are a rogue) or Deianira as your generals as their damage boost will apply here as well!
Hope this helps and happy hunting!!
Sincerely,
King and Ozil