galio main here, the item change hurt for sure. Now i wont ever reach 40% cdr.
but i just exchanged it to double dorans -> abyssal scepter 100% of the time now. maybe ill buy catalyst -> roa if its a passive lane, but being reasonable, its almost always scepter.
final build looks like this
(now i consider enemy team comp and is it more important to have CDR, flat AP, or pen)

liandires/rylias/void for that maximum pen build so i can really put a dent in and punish non MR buyers.
I wont touch MR items, really bites I know, but theres simply no room for more items.
CDR is super valuable, but AP CDR just isn't viable without
anymore.