Reserved mana from skills

https://www.pathofexile.com/account/view-profile/locakshun/characters

Character: DiallasSoncho

Sorry for the newbie question. I'm following Goratha's guide for a glacial hammer jugg. After I've enabled Hatred and Herald of Ice (249/729 mana left over), I do not have enough mana for Determination. Is there anything I can do to use Determination while Hatred and Herald of Ice are activated?


Thanks in advance.

Never mind, I found the solution.

https://www.poewiki.net/wiki/Alpha%27s_Howl

Gives me 16% increased mana reservation efficiency. This leaves me with a whopping 17 mana. Gonna give this a whirl and hope I don't run out of mana.