Mountain Lord Moxie
Although he had a long lifespan after reaching the Sixth Tribulation realm, Meng Chuan still cherished his time.
I'll forget about domain-type mystic techniques. Meng Chuan gave up after scanning the ones available. A mystic technique was a functional use of the laws. However, the techniques he could use were typically inferior to treasures refined by Seventh Tribulation Eminences, much less Eighth Tribulation treasures.
Therefore, buying a Seventh Tribulation treasure array formation was much better than arduously cultivating a mystic technique himself.
The only difference was that the treasures would be lost if their Essence Soul avatar died in battle. However, if one used mystic techniques against an enemy, the losses would be negligible.