If titan is at greater than 50% health with X hours left, I calculate average score per flag used, try to figure out how many potential flags we’ll have left (as well as the probability of every member using them) before the titan escapes. If I believe it is likely we’ll be able to get the titan mostly killed (say below 15% HP) by around the 3 hour mark, we go for it, using flasks if necessary. If I believe it’s not physically possible to get the titan down to a reasonably killable level in a reasonable amount of time, I call a cease fire at around the 11 hour mark (that way every member should have 3 full flags by the time the next titan appears).
It’s not an exact science, depends on the titan and how many of us have hit yet, how well each player’s hits have done, how many flags might potentially be left (and how many might actually get used in the remaining time frame), whether or not somebody might be leveling up soon, also asking some of the higher scorers how many titan flasks they have available… mostly guesswork on my part, but we only have 11 members so it’s not too difficult for me to calculate how many flags are left, and easy to roughly calculate how well they might fare with 2-3 more if they’ve already hit 3 times by taking the average of their first 3 scores, then subtract a bit from that to account for potential bad boards and the possibility that they might not use every flag.
I’m making it sound more complicated than it is. I really mostly just guestimate, very roughly, based on who has already hit, how well they did so far and how many hours are left. I don’t bother going for ones that still have a ton of health left at the halfway point, especially if the hits logged so far haven’t been very good. That’s just a waste of flags and potentially flasks too.