I'd prefer Tachyon Broadband / Sikka Broadband over airtel or Jio. Both are indegenous to Lucknow, offer cheaper rates and above all, almost all issues are resolved on the same day of you make the complain before 3pm.
Both Sikka and Tachyon offer CG-NAT same as Jio, although it shouldn't be a problem if you aren't running something like Plex or Apache.
Tachyon is slightly better than Sikka when it comes to competent staff, and can help you even with complicated custom setup.
I'm not into gaming, so can't vouch for pings, but hit me up with the addresses you want the pings for. I have a primary Tachyon connection and a secondary failover airtel Xtreme Fiber connection, so maybe I can guide you.
(TACHYON uses airtel's trunk lines, so there's not much difference in performance speed / latency wise.)
Much like Jio, both Sikka and Tachyon are prepaid, so if you plan to not use internet for a certain time, just don't pay. Airtel is postpaid, so they charge you regardless of your needs.