Amps play a significant role in my bag. Mine are all FRs and sit between my beat FR Volt (which is about where I think a new Amp should be) and my newer N Volt. Between Volts and Amps, my FDs are completely covered (except for the utility role which is held by the Resistor.) My primary E Volt is very Teebird-ish so it occupies that stable to slightly OS slot and holds up really well in Oklahoma winds. I haven't really clicked with the slower FDs from MVP/Axiom so they haven't replaced my Volt/Amp combo (aside from the aforementioned Resistor.)
I primarily use the Amps for more technical holes as they tend to lock onto whatever line I put them on. Mine don't flip easily unless there is a headwind but they also don't fade out too much. They are more like a Volt that has lost it's LSS before it's HSS. I've got a stormtrooper that is my most accurate driver in my bag. At 300', it's straight and has a fade of about 5'-8'. Definitely one of my most treasured discs.