The main problem with tier 2 tanks, is that people don't know how to kill them. People expect to kill a marauder solo, and unless you are dealing with a not so good tank driver, that simply will not happen in 9/10 cases. It is definitely possible to solo these tanks, but very difficult. That is proper!

Lay remote explosive traps on roads, hit them with a swarm launcher a few times so that when they chase you to try and come kill the guy with 'harmless' swarm launchers, he goes boom when he rolls over your trap! The other night I actually killed two tanks with the same trap at the same time without even knowing the second tank was there! I was pleasantly suprised to see six kills pop up on the feed. Being on the other team's comms to hear the rage was even sweeter. For the next four or five rounds I was matched against this team of 3-4 tanks, and proceeded to harass them nonstop all match, killing them quite a few times while only dying once or twice myself over the course of all of the rounds. More importantly, in forcing the tanks to flee from me I was stopping them from steamrolling my team. This meant their kill counts plummeted in comparison to what they were in rounds I have been on the same team as they were. :)

Traps are very effective, and swarm launchers can really do some damage if you keep at it. Teamwork is your best weapon against these, as a smart driver you will have an absolute nightmare killing solo.

On the other hand they also could simply buff the turrets placed on the maps, not necessarily more HP but more damage definitely.
Especially large blaster turrets feel pretty weak for what they are supposed to be.

In my experience, limited as it may be by only a dozen sorties in my Surya, I have to say that I've had to run from a lot of infantry with swarms and forges to go lick my wounds. Maybe it's my inexperience, or it could be that I just suck at driving HAVs. I consider myself to be somewhat clever though, and can say fairly confidently that I've squeezed out every last bit of PG/CPU to fit my Surya with the best available equipment. I will say again, I find myself running from well equipped AV infantry a lot.

Having said that, In the few head-to-head stand-and-deliver engagements I've had against Sagaris Tanks, I've managed to come out on top more often than not.

Prototype swarm launcher shoots 2 more missiles than the normal one, and one more than the tier-2 one. This is not a lot when you consider one missile (if it hits) deals only 350 damage. Not to mention how the weapon actually takes some time to load like the forge gun.

Now you are at the point of the problem, currently no matter how much ISK or SP you spend on anti-vehicle equipment you don't get such super weapons comparable to these marauders.