i take distortion on some champs even if i only have flash. ex: galio. i flash then ult for initiate. the lowered cooldown on flash lets me flash into my ult more often as galio's ult already has a long cooldown, so they are near the same, off by only a little.

I buy distortion on jungle fiddlesticks every game, usually as a VERY early buy (Dorans ring > Sorc shoes > distortion)

I also find myself buying alacrity lategame a lot if I'm not an ADC. I just don't like homeguard much unless they're sieging our inhib turrets. The "time it saves" getting you back into the action is pretty much NEVER worth it unless you're doing something clutch like re-engaging a fight in your base, or saving an inhib. people forget that 425 gold is a LOT of money...

I go Homeguard every time. It's way too good.

homeguard + revive/tp is pretty glorious :v

When I play Leona or Diana, I get Captain...ESPECIALLY with Leona. The fact that you can be chasing an enemy down is nice, but you need teammates hot on your heels; if they can catch up with you or even pass you to get in range to slow the enemy, it's perfect. The main purpose, though, is obviously for when you land that Zenith Blade--your allies close on the enemy faster, and because you want the battle to center on you, Captain boots are a good choice for Leona.

Diana works similarly; you land the Lunar Rush, close on your enemy, get your allies in there.

I can also see Captain boots being good on Warwick and Rammus...

I get Captain on my more aggressive supports, like Leona and Taric. Combined with Banner of Command, and you get some great pushing potential.

I almost never buy any enchantments when I play support since the majority of my gold's spent on other potentially important support items/wards.

Captain on supports is nice.