Zurgo Stormrender Mobilize, card draw, and pinging is a nice recipe for aggro
Here are some tips for building your first Commander deck in a way that makes the sheer size of the format less scary
Planeswalkers: Karn, Scion of Urza This Karn is a starting 5 loyalty Planeswalker whose first 2 abilities provide card advantage
These two things have led to a wide open metagame just in time for Store Regionals, Regionals and even our first Nationals in Dallas, this upcoming September
Although his uses can be combined to both offer something to an archetype generally speaking one is the primary and the other is a nice secondary bonus
To this point, Greninja ex has not seen much play as its own dedicated strategy, but it does see play as an alternate attacker in Palkia VStar/Dusknoir lists