Yes... Another option on SP with the Alacrity scrolls, if ROT timers run while you're logged out, is to use a scroll, get the gain, log out immediately, then come back on after the ROT timer passes, get another gain, repeat.
Unless something's changed in the last few years, the Alacrity scroll timers don't run while you're logged out, so by logging out after a gain and logging in after the timer's passed, you can get multiple gains per scroll. I've even seen people do it on other shards for skills that you rare get a gain with other than the GGS, logging out after the GGS gain and logging back in the next day. ROT at the high end actually works quicker than GGS, even if GGS has the early advantage.