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Xin,Darius and talon might not have the same use but they do have a common thing, their build, aside from the boots, they all have the same build that makes them dominate early,mid and late game.
I have tried 9 sets of runes and this is the one that works best:
All attack speed runes for mark and seal
Life steal runes for quints
Cool down runes for Glyphs
The items makes them into massive damage early game and turns them into mini tanks that do massive damage mid game. The rest is pretty much self explanatory.
Edit: Why berserker's graves for Darius ?
Well for Darius, YOU NEED to have it, you do your stacks of his passive way faster and results the kill WAY faster for his ult or Q ( those boots are a BIG essential that people over look for darius)
i got pretty confused with this but ill explain what to do, basicly for darius, max out his Q first ( upgrade it as much as you can when you can) and with Xin you max out your E first, it is a priority. For talon, you max out your W first.
Side note thats very important
I looked at the stats sheet and let me tell you, its ******** his stats are WAY higher, he has about 122 armor and 88 magic resist, 4208 hp, about 367 dmg and 46% life steal.