Define "prioritise"
To me prioritising my children means that I consider them, and the impact on them of each decision I make. If it negatively impacts them then it gets thought through and balanced up, and most of hte time it doesn't happen. They don't always get what they want, but neither do I.
So yes sometimes children have to go to childcare when they'd rather stay at home because the parent has to work. But no I'd never work away for two weeks, then choose to go on a child free holiday for two weeks missing their birthday, and then go away for 9 weeks after that with work meaning I didn't see them for 13 weeks at least.
Each month when income comes in housing, food and clothing is the priority. In exes house it's housing them (fair enough), feeding their household (fair enough), paying for their car, activities for their children, holiday for their family unit, putting a set amount in savings then providing for the twins if they have anything left over - not fair enough.
Holidays - Ex and his wife have chosen to have 3 children. This year they chose, for the second time, to go to Disney for their holiday. They cannot afford to take 5 children to Disney. So they didn't take the girls. They could easily afford to go on another holiday with all of the children, but they didn't (and it's not like the girls get fancy holidays with me to balance it, plus they are 13 and their half siblings are 2, 3 & 5 so even if they'd put off the holiday for 5 years when the girls would have been too old to go the little ones would still be young enough).
Now when Ex's new wife was ill in hospital it was absolutely right that he cancelled having the girls for the weekend. I'm not a dragon. However the fact that he didn't see them for FOUR months, not even for an hour, because every hour that he wasn't at work was to be spent with her wasn't right.