He was actually focusing more on using the bare minimum of power to get the glamour started than to get it complete the first time, focusing on power management, which made it take longer, but was even more useful than just the glamour would be. He focused creating on the black armor that would be his 'Summer Knight' persona, allowing him to easily create it without needing the damn hat. All in all, he knew he would have to kill a couple people, maybe make a few disappear, but with any luck, he wouldn't have to do more than that. The first power display would cow them properly. If not, he would have a 'little' fight where he would have to kill at least three people in quick, almost contemptuous ways, to get the message across that while the Summer Court was NICER than the Winter Court, they were not NICE.