How kind of consumers are more suited to take up a Fixed Price Plan or a Discount Off the Regulated Tariff Plan?

Well if you scared of the variation of the SP tariff like whether it will go up or down, my recommendation to u is the DOT plan where regardsless of price, it is guranteed numerical percentage savings of ur monthly electricty bill. But if u wan to save more, based on current plans offered by most companies, fixed price would be better as historical trends of SP tariff shows it is on an increasing trend, albeit not sharp spikes but gradual. Hope that clarifies