Two Legs Good, Four Legs Better

Making Eurybia into a centaur. As with some extreme configurations you have to give something up. Two plantigrade legs at the cost of the rear armour (Extra Armour 4) and a coolant system. It also has a rear sponson mount, for a rear-facing weapon, because it is a centaur.

Weapons-wise I think two gun batteries and a laser blade in the rear mount. Or perhaps two claws and a laser battery. Either way, the plan is to deploy in the middle of the board and work the danger zone with legs and range 4 weapons. In terms of opponents this is figuring Rhea Quaternary's guns probably want to occupy the same space. 

Six cards for Limbs, four cards for crew, three cards for weapons, two for shields, one each for sponson, sensor, and coolant, four extra armour. Full crew and weapons requires 10 cards, leaving sponson, sensor, coolant, and three extra armour. One extra armour if the last two are activated. 

The coolant proposition is to replace two actions with a repeated action next round. It's not great until that repeated action is above the curve, 1 charge to three cogs like firing a macro gun, or operating with master crew. Because it levels out that 1:1 ratio of cards spent to cogs used. 

In which case a laser is the perfect weapon to shoot twice. The laser blade hits hard for that above-the-curve effect, while the laser battery might be more effective in volume where the first shot might soften shields and waste defensive action. A claw that can plow another Titan through a large building would also be on the menu. That or just keep the master crew running cool.