Season of Souls Atk Speed (Joust)

Bakasura 3 gives your basic attacks true damage which is why attack speed is so important.
Golden Blade is a cheap item with good attack speed. There is likely a better starter but I appreciate the movement speed for any early game escapes/rundowns and in case you, for whatever reason, need to help clear wave. Its passive in addition to Bakasura 2 is also nice for quickly clearing camps.
Hastened Katana has the obvious benefit of granting Haste on basic attack hit and an extra 7% movement speed. This makes it easier to confirm the entirety of Bakasura 3 unless the enemy team uses crowd control or makes it back under tower in time.
Shogun's Kusari (order interchangeable with Berserker's) is a nice third item as it provides another attack speed spike along with magical protections. Season of Souls has buffed protections and nerfed power, so this item is stronger on Bakasura than it would have been in previous seasons. The extra protections allow you to commit a little harder while also be punished less by a mage if you are briefly out of position. I prefer Shogun's over Berserker's here simply because mage burst is harder to mitigate with Eat Minion than other forms of damage.
Berserker's Shield is useful for the same reasons as shoguns except now we are giving Bakasura some physical protections. Again, the attack speed this item gives is important, but its passive allows Bakasura to commit even harder to kills/hitting his 3. Attack speed boost with some damage mitigation makes peeling through damage dangerous for the enemy team and will likely win you any 1v1s (unless you're underleveled).
The Ferocious Executioner doesn't provide anything that Bakasura doesn't love: solid attack speed, the most power in the build, our only "penetration", and a passive that works incredibly with our protections as well as buff Bakasura 3. This passive, berserker's passive, and hastened's passive all mean that once you're on your target, it will be hard to peel you off, especially if they are alone. A reminder that if you get all stacks of ferocious (which shouldn't be hard with your attack speed and if they decide to basic attack you), you'll reduce their protections by 24% and increase your damage output by 20% (if they aren't already dead).
Qin's Sais continues to buff what we are already focusing. It has more power, more attack speed, and more power per basic attack. Can't go wrong with this item to close out the build. Also helps shred tanks even more (which Bakasura already has with his 3 and The Ferocious Executioner).

Once you've finished your build, consider replacing Golden Blade with one of the situational items. Late game Golden Blade will not be doing nearly as must as the items on the situational list.