Dude the Obj.704 has decent front armour, good speed and excellent maneuverability, you need to play it how its made bro.
The American TD line is good, and the t-95's front armour in an encamped position is excellent, BUT the Obj.704 is one of the most fun tanks to play if you know how to play it. From my experience, just sitting back and being a support cannon works best. For instance the gun has great damage and pen but the reload time is shit, so use this to your advantage: Peak and shoot, Peak and shoot. This coupled with great camouflage makes for a deadly TD.
But every time you line someone up you have to ask yourself is the 2,500 credits worth the shell your shooting them with?
I know how to drive the 704. It's still shit.
And it's 1650 per shell.