What subject do i keep on?History or Irish

I did 4AS last year but cant decide between dropping history or Irish.I plan to keep on chemistry and food and nutrition but i don't need either irish or history for uni, i find the content in both of them enjoyable but hard to keep up with the work load.I only need to be able to get a good grade I dont want struggle too much next year and not get the grades i need. They're both ccea exam board and have no coursework so would be purely exam based. What sort of things should i be considering when deciding what to keep on? or has anyone done either of these subjects and could tell me how they managed the jump between as and a2?