Oh, I agree it's not worth losing a third point of resonance, but I think you can fit a bit better of a setup into 2 points.
I'm not a big fan of Math SPU; it's cheap, but it costs .15 cyberware essence that could better go elsewhere and it gives +2 to only some uses (and not even the most important ones, since you can always get a sprite to crack difficult encryption if you really need to) of one skill.
Encephalon 2, PuSHeD, and Cerebral Boosters 3 are all great (I'm assuming you are waiting to upgrade to alphaware cerebral 3 later on).
That's 1.2 cyberware essence and .56 bioware essence accounted for.
The other part of the "power trio" for logicmancers is to get a nanohive with Neocortical. I see you have the nanites, but you really want a hive and it can go nicely with some defensive boots. Since you're trying to do both combat and hacking, I'd be inclined to get your offhand a partial cyberarm with cyberarm gyromount, nanohive, and armor. That gets you a bit more defense, a bit more offense, and a situational but large boost to logic skills.
If you also had that alphawared (which may take some time to save for, because the nanohive is expensive), that's .36 more cybeware essence, putting you at 1.56/.56. At this point you probably want more bioware; you can fit in up to .3 more essence of bioware. I'd probably grab a Trauma Damper and a Reflex Recorder for your favoritest skill, then start putting money into the piggy bank for Adapsin and some deltaware.
