The best way to get a set of high QL spirits is to use spirit siphons.
The process to get these siphons is fairly time consuming, you must farm QL 220 spirit type pocket bosses, kill them and if you're lucky you will get a high QL spirit siphon.
The 3 pocketbosses that will work for this are named Ogdan, Captured Spirit, and Exsequiae.
Ogdan
can be farmed from Conflagrant Spirit, Enkindled Spirit, and Incandescant Spirit. All three of these guys are located just a bit NW of the Yuttos Inferno exits.
Captured Spirit
can be farmed from Devoted Spirit Hunter, Bigot Nzaemihiel, and Pursued Spirit.
Exsequiae
can be farmed from Bigot Helozabasael and Torrid Spirit.
The surrounding mobs of these dyna bosses also have a slim chance of dropping pattern parts.
You'll want to farm up quite a few of these, unless you're lucky it will take at least 10 pb's to get a useable siphon.
You must get at least a QL 249 siphon to get tragic spirits, it must be used on any SL mob of level 209, greater QL's can be used but a mob of 209 is the minimum level to get a tragic spirit. QL 259 is the minimum QL to attain troubled spirits, used on a mob of level 217. QL 269 is the minimum to aquire unhappy spirits, the mob level must be 225.
The levels I posted are the minimum level and QL to be able to siphon that level, you can use any ql siphon you want to try and get whatever spirit, what spirit QL drops is determined by the level of the mob.
When siphoning sometimes you will get one QL step down from what can spawn but never one up, I dunno why.
What kind of mob you siphon does not matter, I like to use my siphons in catacombs as it's easy to get certain level mobs alone in stairwells.