Level 60+ is where a lot of people are going to stop playing Blue Mage, simply because of the difficulty in getting many of the spells after these levels.
In particiular, two level 63 spells are a PAIN to get because special conditions have to be satisfied to get Imps and Qutrub to use Frenetic Rip and Spinal Cleave, respectively.
Let's start with Imps.
There are two places to think about.
1.) The ship to Nashmau. Imps spawn here at night and they were Decent Challenge to me at 61.
2.) Orderly Imps in the Graveyard of Caedarva Mire (West exit from Nashmau). They were VT to me at 61. This is where I got it, with a 66 DRG, a 65 RDM, a 70 BLU, and a 75 WHM to help me out.
Normally Imps only use two moves, Deafening Tanatara and Abrasive Tantara (Silence and Amnesia, respectively, so bring echos). They will *only* use Frenetic Rip if their horn gets broken.
Breaking The Horn
It seems that any Critical Hit will have a chance of breaking the horn. Often people use SA + WS to do this, but this will often take off more than half of the Imp's HP (they don't have a lot). It's much easier to get the horn to break if you're keeping them alive. The horn broke for me on regular critical hits, but it seemed that critical hits on Weapon Skills or Blue Magic had a better chance of breaking it. Broke most of the time when Head Butt criticale'd or when one of the hits on Vorpal Blade scored a critical hit. Killing them slowly, we had about a 5/10 success rate at breaking the horn before killing them. So it's not as hard as it's been said, as long as you know what to do.
Frenetic Rip
So you've broken the horn? Now you need to feed it TP as fast as possible. After about 30 seconds of going without a horn...it will look constipated and look like it's pulling another one out of its butt...(i'm not kidding...that's really what it looks like...at first my party didn't believe me that they were making new horns and maybe that it just didn't break, but they indeed are capable of creating another horn, by whatever methods). If it uses a WS before it creates a new horn, it will use Frenetic Rip *only*. So you just need to be sure it uses a WS before that "omg i need a new horn" threshold.
And now the fun part...Qutrub
Qutrub can be found in Arrapago Reef. Best way is to enter from Caedarva Mire, but you'll need a Lamian Fang Key, be aware. After going through the first Iron Gate, go West and cross the COR ??? boat and go to the map change at F-10. This will take you to the second map, where there are PLENTY of Qutrub. I suggest fighting them around I-10, as there's a safe place to fight them there.
Two Weapons
Qutrub have Two Weapons...the one they start with, and a scimitar like blade sheathed on their back (and H2H if you want to count it.
This leads to three combat states in which they can be.
1.) Fighting with original weapon.
2.) Hand-to-Hand.
3.) Fighting with second weapon.
In the Qutrub's first form, it will use two self-buffing wail TP moves, Mangle (a 3 hit attack, watch out for shadows), and a 1-hit move called Leaping Cleave.
SE is teasing you.
To get them to use Spinal Cleave, the first weapon must get broken. How does that happen? Once again...critical hits. Multiple fast hits in a row seem to have a higher chance of breaking it...the best way I've seen to break it is Rampage. Almost everytime Rampage was used on the Qutrub (I went with myself as BLU61, a 70BLU, a 75 DRK/NIN, and 2 75 WHM), its first weapon broke. We broke the weapon every fight. It's not as hard as breaking an Imp's Horn.
Changing States
When it's in it's hand-to-hand form, Qutrubs are able to use the wails, Hex Palm (an HP drain move that's pretty strong, and Spinal Cleave.
Spinal Cleave is the act of the Qutrub quickly unsheathing its back weapon and slicing you with it, that's why.
Once you break the first weapon it will occasionally switch back and forth between H2H and using its second sword. Nothing seems to trigger this, it just does it periodically.
(It won't use Spinal Cleave when the second weapon is out)
Be careful, though. If you break its second weapon, it can't use Spinal Cleave for the rest of the fight.
Saftey First
Both me and the other BLU learned it the first time we saw it (= 3rd Qutrub). The first one didn't use it, the second one wiped us with Sleepga II (Go Go Reraise III ^^)
For this reason I suggest bringing a Healer and having them use Poison Potions.
Anyway, that's about it. Enjoy your new moves and have fun ^^
Good Luck
