I am a Phd student (thesis submitted in January 2018, not defended yet) in applied mathematics. My first paper was published in February 2018 in a tier 1 applied math journal, two other papers were recently rejected from tier 1 applied math journals.
I discussed the rejected papers with my advisor, we decided that we will work on the comments of the reviewers and associate editors and then submit to some other tier 1 journals. Now that will take at leat 5-6 months and then these two paper may get accepted in 2020 in the best case, or in the worst case it could be in 2021 (generally, top tier journals take a long time).
Now, my advisor is saying that you should publish continually (there should not be gap between publications) and suggested me to submit the rejected paper as it is, but if these two rejected papers are again rejected I will be in trouble. If a paper gets rejected twice then it may be hard to get that paper accepted in future.
What should I do in this situation ? Any help/suggestions will be useful. Thanks in advance.