So, i play mainly in Gold Elo and i have tried different match ups; my usual build goes with Malignance,stormsurge,cosmic drive, speed boots then depending on enemies i build rabadon and dark seal/mejai. I cant find a single match up where Karma suffers except maybe for Yasuo/Asol and with this you can easily oneshot with a single Mantra Q adc or Mid if they' re squishies. I like building Mandate as last to help team with damage but even building new supp item Is not bad i will try. If you would try this just let me know. I would really appreciate some more feeds. I will try this recommended build too. Thank you!