Critique for Potential Itinerary: Galway/Dublin, Paris, and London?

That is reasonable if you just want a taste of each of the four main cities (Shannon, Dublin, Paris, London) , you should be able to hit all the main attactions, Effel Tower, Louve, The Tower of London, etc. I would just spend the whole 2 weeks in Ireland because I love it! When you make whirlwind trips like this most people don't factor in enough time for travel from one major city to another, it just takes more time then we think, but if you will never get to Europe again I see your approach. I would purchase the Rick Steves book, Europe through the backdoor, and plan out a agenda for each day as to what you want to see and experience including places to stay and eat and if you feel comfortable with that plan then your on your way.

PS: While in Shannon get tickets for the Medieval Banquet at the Bunratty Castle (great food and the music is awesome) and when in Dublin get tickets for the LIterary Pub Crawl, this was a highlight of our time in Dublin. (It would be best to buy all tickets on the internet ahead of time)

I think this is a totally rational itinerary. It will give you a nice taste of Ireland and Paris and let you return to London, which you loved. It is not too rushed in my opinion. I would be tempted to take a day from London and/or Dublin to add to Paris because there is so much to do there. But that is my personal bias. (I was not that crazy about Dublin, and while I loved London, you have already been there.) That said, ending with four days in Paris and then four in London will be a great and fairly relaxed way to end the trip. Hope you have a great time!

Thank you for the feedback! I agree that we need to add a day to Paris and can spare one of the full days in Dublin. I am an English teacher, so the literary pub crawl is definitely one of my must-do's!
I could easily spend two whole weeks in any one of these places (I spent 10 days in London with side trips years ago and still wasn't ready to leave)! I tend to always want to return to a place a second time since the first go I get a feel for it, discover what I like or want to see more of etc. So it's my rationale for the "tasting menu" tour.

You actually have almost five full days in Paris, as there is not alot of settling and resting from a flight that short needed, and no jet lag. Book a morning flight.
Same with london, almost 5 full days, if you book a morning eurostar you should enjoy the bulk of the day in london as first, its only 2.5 hours, and secondly you gain an hour going west.

Ps i love paris, go often and for minimally 7-8 days at a shot, but we loved Dublin, and are in fact returning this May for 4 days. There is so much to do in and around Dublin, i would never suggest you take a day from it when you only have two days. The museums are amazing( frankly i am a bit put off when all people seem to think there is to do in Dublin is to hit bars and pubs, and the Guiness tour is their idea of a cultural highlight), see the Bog mummies, the treasure of the Broighter find, Hill of Tara and Newgrange, Howth, and yes, we took and loved the Rural Pub tour( highly recommend, get up into some very old pubs in the Wicklow mountains( hills lol)