you can't buff kled... he's too relevant in this meta.
Kled is like
in that he is good earlygame, good lategame. Midgame is kinda meh if he isn't fed.
If you build
you can legit 1v5 as kled. Just take
and 
Steps to 1v5 as kled:
PROLOUGUE. press R to engage. Try to hit a squishy.
ONE. squishy has burned flash trying to run. if your ult missed you use E and get them. If your ult hits you use E and get them.
TWO. attack the squishy and use
to proc your W faster. Now the enemy tank, jg, and possibly mid come.
THREE.
the jungler and E to the mid. Q the mid keep autoattacking the mid. You've fallen off skarl.
FOUR. your W came back up. finish off the mid then attack enemy jg.
FIVE. enemy jg is dead and enemy tank/sup are trying to kill you or are running away!
SIX. enemy tank is easy to kill for you so no explanation needed much. Just EQW and
when it's up
SEVEN. If you manage to have trouble killing the enemy sup... you haven't played league in a year... or twenty
EDIT:
I had proper numbers up but the forums changes them so I had to change the numbers to word-form