The significance of harmonizing with the Path of War goes beyond this: previously inaccessible powers, apart from Favorable Weather which remains gray, can now be harnessed by oneself.
It appears that the Path of War is not an exclusive artifact of Zalanda, but an artifact of the Goddess of Strategy, accessible only to the Chosen who have completed the harmonization.
The moment I completed the harmonization, the ability that boosted Intelligence also turned gray and started a countdown.
In fact, this ability is a charging power, and the countdown represents the process of drawing magic power for recharging, which takes a relatively longer time as compared to others that need just a day or two.
It also highlights the preciousness of permanent intrinsic attribute enhancement. Gaven had even seen a book on attribute enhancement that required a century to recharge once used, making the Path of War's one-year recharge time seem brief by comparison.