What pickups are in it now?
Seems you want to go for a thicker/crunchier tone with the rails. I’ve used, they are great, but you need to accept that you will lose the essential “Strattiness” of the tone with them. I decided I wanted my Strats to sound like Strats and went back to traditional alnico slug singles.
If what you want is a Maiden-style rock guitar it’d be hard to beat the rails. If what you want is glassy Strat tone and middle position quack stick with the stock pickups or if they are truly sucky drop in a set of traditional-style pickups.
I have a G&L Legacy now and I consider the pickups in it the best Strat style I have ever used, and that’s coming off a couple Fender Custom Shop Strats that I owned.