Blue Mage
In a duo it is possible for Blue Mages to reach Lv75. If solo, this is not as effective as partying, but there are enemies you can go after at almost every level.
Preparation
Having the correct spell set up is important, as well as sub job. Since this can vary hugely depending on what level you are and what spells you have learned I can only give a rough overview rather than specifics to you.
The choice of subs is; Ninja, White Mage, or Red Mage prior to high level. This is to either be able to avoid damage or heal it back to a larger degree than normal. Next you must pick spells which are high damage (multiple hit) as well as any and all healing related spells you have learned.
Here is a pick of spells; Bludgeon, Healing Breeze, Wild Carrot, Magic Fruit, Refuelling, Frenetic Rip, Hysteric Barrage, Disseverment, Death Scissors, Sickle Slash, and Head Butt.
Ideal Enemies
Prior to end game, your target enemies are either low conning easy to kill targets or Goblin pets. These are enemies which you can find conning Tough to you, but have tiny amounts of HP and attack compared to a normal Tough enemy. You would find a Goblin with a pet, wait until its back is turned, and safely pull the pet away to kill. The Goblin would eventually re-summon a pet if there are no more to chain with. Blue Mages physical damage spells rip these pets apart extremely efficiently.
For merits or finishing off those last two or three levels, Blue Mages can take on Heraldic Imps. The set up for fighting these is very specific; you must have pretty much all the list of multi hit spells I mentioned above as well as subbing Ninja. Imps hurt and cast nasty spells, so you must kill them quickly, stun bad spells, and avoid damage. Amnesia doesn’t stop your spells so don’t worry about that. This is very effective but can sometimes be dangerous depending on what spells the imps decide to cast. Also, unless you can find a quiet location all to yourself, Merit Point parties will be after the same monsters as you.
Tips
·Carry a good selection from the medicines section of this guide including; a re-raise scroll, refresh drinks, XP ring, and Echo Drops
·Take the time to learn the spells which will best assist you soloing
·Consider buying a sword with Demon Slayer trait on it to help when fighting Imps
·Goblins aggro by sight and this includes if they see you fighting their pet
·Goblin pets link by the same rules as a normal one of their type would (if it was a beetle and you were fighting a beetle nearby then it would link and attack you, bringing the Goblin with it)
·Learn to correctly use Head Butt
·Self skill chaining can speed battles up drastically