How do travelers deal with transportation strikes in Paris"

Walk, get a taxi, take it on the chin. There's not a lot you can do about it, strikes by their very nature are disruptive, that's why they're an effective method of demonstrating dissatisfaction.

Did you personally do this and if so were taxis hard to find? I understood taxis sometimes also join the strike?

This recent forum post may have some useful information for you - https://community.ricksteves.com/travel-forum/france/tourist-experience-in-paris-during-strike

Did you personally do this and if so were taxis hard to find? I understood taxis sometimes also join the strike?

Of course it depends on the strike and who's partaking but bear in mind, if taxis aren't striking there is a bigger demand for them so availability becomes a problem.

I have no personal experience, I wasn't enamoured with Paris so have no desire to return and likewise Barcelona. Neither visits coincided with any strike action. Your best bet is to base yourself within walking distance of the main sights you want to see however this can prove difficult if they're spread out. If your concern is potential trouble then avoidance is essential and there's no solution to visit a sight if there is a risk of violence nearby.

In essence there really isn't a comprehensive answer as there are so many variables, you just have to rely on common sense.

We walked everywhere and when we couldn't anymore we mapped out on a smartphone and managed to get on the bus 2 times on the back with everyone else as it was extremely crowded. I was there 3 days about 2 weeks ago with my 16 year old nephew; he plays basketball so he has high level of energy so I used the money for taxis on eating.

I was there this past December and taxis were hard to find, especially on rainy days. If you are going in March, there is a high probability of rain.
A big issue was the amount of bicycles and electric scooters everywhere, even on sidewalks. This made walking difficult in some areas. Be very careful crossing streets, there are inexperienced riders/drivers on the bikes and scooters.
My best advice would be to stay in a central location where you can walk.

I do believe the airlines were also effected, at least at the start of the December strike. Under the France Forum , there have been many "on-the-ground" OP updates, so I suggest you check those posts. You can also do a Search on this site, for French strike related topics.
There seem to be many "domino effects" of the strike- museum staff can't get to work, so museums close or have shortened hours, etc.
Safe travels!

The main Metro union has suspended the strike for now. Hard to predict what it will be like in March.

https://www.thelocal.fr/20200118/union-calls-an-end-to-paris-metro-strike-after-six-weeks

The great thing about Paris is that it is generally a compact city. We walked everywhere. On a couple of occasions, we figured out which buses actually were running and timed our transport needs accordingly. Dont let a transit strike bother you too much, and enjoy your holiday.

I deal with it by not going to Paris. A few years ago I was unable to meet up with a relative living about 90 minutes away because of a strike.
I’m going to Portugal and Spain instead of France this year.

The Wall Street Journal reported a few days ago that the strikes have petered down substantially because strikers need to get back to work and earn money. What I wonder is how long until the strikes resume because nothing has been settled.

A friend came back from a week-plus in Paris about a fortnight ago. He said even though he ate without restraint (including pastries and macarons), he lost 2 kg (4.5 lbs) because he walked so much. He said the Metro line #1 was running - handiest for tourists, not much for locals.

The last couple of summer trips have been affected by train strikes in France. I just deal with it, I plan around it, ie, circumvent those dates, which usually were on week-ends. It always depends on which type of train causing the greatest impact on your travel plans in France., say, 2 out of 5 RER (local) trains would be running on scheduled. I watch the French news in the hotel room to keep abreast of the latest.

In Paris if certain Metro lines are reduced, etc, I take the bus. Gare du Nord is the place I stay and it's an extensive bus junction point plus a bus depot is at Nord too, if not, then I take buses if they go to Gare de l'Est, then walk over to Nord.