RyFen

Ruins Raider

Start each fight with a rally.
Scratch until you have the breath to eliminate.
Make sure your Rally Buff is up and Eliminate away.

Note: You can swap this build into a Meditate Monk with just a Meditate and a Haste stone. Which you prefer is up to you. This dragon started with scratch to allow further exploration.

Ruins enemies - simplified kill order

As you fight in any venue, you will learn how you prefer to handle different packs and which enemy you want to kill first, but my memory is terrible and the best I can usually do is go in the order of contusers, melee, and casters. More detailed order lists can be found in the original build guides. That being said, the speed of the trainer and setup for these fights means that kill order is not terribly important.

1. Contusers - Longneck Medium
   Getting hit with a contuse is cause for reloading the coli unless you have only the Longneck alive and can do a mediate/haste/rally/defend cycle until the debuff has cleared, but by that point the Longneck has probably contused you again.
2. Melee - Greybeak Reaper, Tengu Caller, Nightmare, Carrioncorn, Wendigo, Pronghorn Stomper, Infestation Hound, Wraith Hound, Shatterbone Vulture, Tatterwing Carcass
   While some of these can cast spells as well, they do melee to build breath. Ghostlight has mostly melee enemies, which is why anticipate tank builds are also popular for this venue
3. Casters - Lux Spectre, Aer Phantom, Somber Spirit, Otherworldly Aura, Longneck Scholar
   Make no mistake, the casters can really mess you up, but as they have to meditate to build breath, it usually takes them a few turns. Be warned that some of them can debuff your trainer as well to either miss turns or have a higher miss chance.
4. Bosses -Disoriented Spirit, Malevolent Spirit
   Thankfully, these only show up alone, but I don't think it's possible for this trainer to take them down. If you have full breath and life on your trainer and get very lucky with the boss not dodging your hits, you will not do enough damage to kill it and will have to spend a lot of time recovering breath. While it may be possible to tackle the boss if you are leveling other dragons that have stats and battle stones, this is not something I have ever tried, and it makes sense to reload the coli instead.