Simple build simple explanation. Bugs do all the work your job is to make sure you keep pumping them out ulti is only used for hero fights as you will usually be the target if you stun the enemy enough u are not a damage dealer your bugs do that once again all you are is a flesh tank that stuns the enemy every chance u get when laning just melee dont waste your skills on anything except escaping. Very simple.

Same deal you will hit harder as the tank and your more mana based but all you focus on is making the enemy focus on you. your disables are some of the strongest in the game with this build use them to cripple the enemy team ALWAY pop your ulti at the start of a hero fight ALWAYS. Simple to the point not much to it.