Take a look at these Statsticks for Melee Weapons:
[Venka Prime], [Mire], [Jaw Sword], Zaws (Or anything you own a fitting Riven for)
[Brief Respite] may look odd as an Aura but its pretty bonkers on Spamming Frames like [Khora]
Venari Build
Venka Statstick Example
Fleeting & [Streamline] not maxed?
Yes not everyone know but, Efficiency is capped at 175% so in having a 2nd Fleeting & [Streamline] each Rank 4 means less drain ;)
WARNING:
As always Aracanes only enhance the build, they are not needed to play it ;)
Same goes for Exilus, Enhances gameplay but not needed.