Hey Mikey, this is looking pretty solid, but there are a couple of things I would consider as alternatives (these won't necessarily be any better, just different)
Firstly, eStryker with the Lancer, as you saw last night, can do some excellent things with Rebuke, and he can make sure that Positive Charge gets where it needs to go, regardless of where Stryker himself is. He also plays quite well without the Lancer, though, so you could consider dropping it for the squire, and to increase the size of the sword knights to a max unit, and either add in 2 storm gunners to the Stormblade unit (more bodies), or look at still running the minimum unit, instead taking a Journeyman warcaster, the Squire and either a Stormsmith Stormcaller or a single storm gunner. You could also change out Ol' Rowdy for a Stormclad with that single point left over, if you felt so inclined (although the free runs/ charges with Rowdy, and the bond for extra dice on first attacks makes his crit knockdown more reliable, bonuses to Stryker notwithstanding).
As far as second casters go, pNemo can do some funky things, but he'll want a couple of key pieces to go along with him. I'm by no means experienced with pNemo (I don't even own the poor chap), but this is all fairly common stuff with him, so I should be on the money. He'll want to take a unit of Tactical Arcanist Corps, a Merc unit of dwarven mages. They can drop clouds that can help protect Nemo, and they're also magic abilities, so they power pNemo's ability to get extra focus. With them kicking around each turn, he can get 10 focus, before drinking from the Squire. Following that, I would look at taking the new character jack, Dynamo. He gets to shoot up to 4 times, gets re-rolls to hit with his ranged attacks for just being near Nemo, deals some serious damage with his ranged attacks, and if he can make lots of melee attacks (which he can thanks to pNemo's overboost) he can kill most things dead. Each hit he lands, his attacks get stronger, so with pNemo's damage buff up, you can be swinging that final attack at PS24. pNemo probably only really wants to run a single jack though (a lancer might be useful to get his movement spell off, but that's a hefy investment at 35 points), so he might do well taking Journeyman Jakes, who has 4 focus for her to play with, and who buffs the defence of a jack with her spell Sidekick. You could take a Hunter on her for some extra ranged power, or a Charger to get some solid boosted POW12s off - both would help out Dynamo in the shooting stakes, and together they could do some solid work against heavy targets. Other than that, I'm not too sure what to recommend for him, so I'll let some others who have played around with him to offer some advice.