It's triple large, Foxer. Think bigger than mere maulers.
As a Neutrino ship, it's likely to be triple large energy, or if it's one of their higher spec ships, then triple universal.
Preliminary thoughts on balance, as a cruiser, it will certainly live up to it's name and maul other cruisers in a 1 on 1, with triple large energy weapons like Autopulses or the heavy repeating photon cannon. One could also give it those neutron batteries, which if the medium-sized neutron weapon are anything to go by, then it should have a terrifying amount of frontal firepower. Frontal firepower means huge rear blindspot, especially as the bridge appears to sit behind the guns which would stop them aiming "over the shoulder". 3 small slots which are almost guaranteed to be reserved for PD means that missiles could swamp it. Two prongs and the odd module on the bow could be mere design, or they could be potential hidden weapons. With ships like the Lathe, Jackhammer and the Unsung, I would almost vouch on a hidden weapon like a Neutron Lance. If that's so, then this ship is reaching battlecruiser levels of firepower and gonna play like a very heavy gunship. Monstrous, so long as it avoids ganks. Seems like a typical Neutrino ship to me. And I don't mean that in any sort of bad way.