If I'm understanding correctly, you should be able to hit the titan as pertains to the quest, regardless of your guilds cd. Once you do, you have a personal cd and can't participate in any guild hunts till the personal cd ends. Seems simple and straightforward to me.
There's another seasonal Titan that also has this cd. SA was under cd when I did its quest, but I was able to get the required hits in to complete the quest. Once they were met, the cd notice popped up and I was no longer able to hit it and I completed my quest.
I'm sure the only ones that this may be painful to are Titan addicts. I recommend cocoa and lively conversations until any applicable cd ends.... it will pass more quickly for you.
Edited by BadPenny, 22 December 2017 - 19:44.