If you're playing Kayle as an AD carry, solo top or jungle, damage items and kills are what you should be aiming for. Don't build for offense if you're supporting a carry in bot lane.
What Psiguard said. As a support your job is to protect your carry/team and feed them kills. And seeing as supports let there team farm minions your forced to go gp10s. Of course you can start building some other more tangible items from assists and the gold you make from your gp10s.
But even then your items should be either auras, defensive items so you don't become an easy target for enemy team, wards and oracles elixir. Not trifroce or rageblade. You don't want to be stealing kills from your carries.
It's good, but Kayle is not a support.
At least not with those items.
What Psiguard said. As a support your job is to protect your carry/team and feed them kills. And seeing as supports let there team farm minions your forced to go gp10s. Of course you can start building some other more tangible items from assists and the gold you make from your gp10s.
But even then your items should be either auras, defensive items so you don't become an easy target for enemy team, wards and oracles elixir. Not trifroce or rageblade. You don't want to be stealing kills from your carries.
At least not with those items.