There are 3 types of lag, and you can really only reduce one (maybe 2)
FPS lag : This is a good way of expressing it. Cover the 15 fps, and look at 60, then cover 60 fps and look at the 15 fps one.
Its caused by having a lower-end computer that has trouble rendering realm. It really shouldn’t be popping up much, because realm is not a very demanding game. The best example I have of this is when you’re in a large oryx castle doing the stone guardians, and there’s a ton of shots and you’re lagging because of that.
Client-sided lag: Lag on your end. Your internet is slow, and because shots ingame are client sided (proof of this comes from the shatters bridge tower glitch), you may be taking damage after a shot hits you, experience lag between hitting spacebar and the ability activating, etc. Client sided lag is very similar to server-sided lag, and some of these symptoms occur in both.
Server-sided lag: Rubberbanding, inablility to connect to servers, etc, most of everything in Client sided lag can be experienced in server sided lag.
Really, the only kind of lag you can reduce is FPS, by turning on The hide particles master setting and hide player shots in experiental settings.