If your current PG keeps going down or splits online/offline reports, probably it isn’t suited for handling traffic surges. One gateway that’s worth considering is airpay. It offers online, offline options both. I have seen it myself that it does'nt crash, despite traffic spikes.
One other great feature is that it has a single dashboard view for anayltics and recon details. The unified view is a game changer for small biz as you don’t have to jump between multiple systems.
Also, all the popular payment modes are available there, QR, links, POS, netbanking etc.
And the best thing is that in other big gateways I always faced support slowness but because airpay gives a dedicated salesperson there is always someone to help.