A Megatron-led Mardu deck gets access to one additional Cybertronian over the Jeskai version, and while you do lose out on some of the more elaborate interactions, you also dont need to do as much work to enable Starscream and Blitzwing as you do to get value from Goldbug and Jetfire
Lutri, the Spellchaser was controversially (and correctly, in my opinion) banned from Commander on release as itd otherwise be an auto-include in any deck playing blue and red (almost any Commander deck fulfills the companion restriction, as this was clearly not designed for Commander)
In the context of this precon, youll probably be casting some of the expensive Necrons early in order to gain an advantage over your opponents while they try to keep up
It goes without saying, that this is one mans opinion, and you might not agree with all choices mentioned here
Brawl Legal Vintage Legal Timeless Legal Commander Legal Pauper Not Legal Oathbreaker Legal Penny Legal Toolbox Buy This Card Notes and Rules Information for Squirrel Mob: Because damage remains marked on a creature until the cleanup step or an effect removes that damage, nonlethal damage dealt to Squirrel Mob may become lethal if the number of other Squirrels on the battlefield decreases
It's not uncommon to get multiple activations from this if it lives