If you use the focus school Naramon will prevent your combo counter from going to 0 immediately when out of combat.

Using wisp or wukong with warcry will fix the little attack speed issue, but you can use whichever warframe suits you best.

You can remove [Sacrificial Steel] or [Volcanic Edge] for a riven, if you want to replace it with Vicius Frost or Virulent Scourge make sure the riven has toxin or cold so as not to lose Viral.

Excuse my english but ñ.