Here are two methods I use while playing against Red Tyrant.
I'll add more videos if you guys request a certain run.
I mainly use staffs but I also can use scythes.
YouTube - Vindictus [Mabinogi Heroes] Staff Evy/Evie Solo Red Tyrant [Hard+Macha]
1st video is longest but it is a more defensive play style still gets the job done.
These are to methods I use when fighting Red Tyrant
if your out of spears and need a knock down to revive you party members, sometimes your party may have all died and you need to by yourself some knockdown time. By using the bomb placements in this method you will be effectively adding knockdown It may take a very long time but its worth it and the safest; you need to do your best to survive as well as deal damage without being destroyed yourself. this also features timing and proper usage of Blind Arrow.
The reason I show solo is because its easier and if you play like this then awesome! your doing yourself a favor xD
YouTube - Vindictus [Mabinogi Heroes] Staff Evy/Evie Solo Red Tyrant [Hard+Macha] 2
This is how you should be sorta playing then sitting back healing. Of course there will be moments you will just sit and heal and run into battle again. But remember to manage your stamina and judge the right heal moments.
This video shows a more aggressive play and the correct timing in doing damage as well as fitting in the proper fire bolts with effective escaping and timing. Most of the time you will find yourself running to the left [aka his right side] so stick to that watch his animations and attack accordingly.
This is if you get aggro and anything can happen in battle and make the right judgments :p
Anyways Cheers :)