Let's see. Thunders are medium range guns, they are fast at later modifications and capable of dealing large amounts of damage. Plus splash damage. Shafts are slow but very potent sniping guns, best for the camper tankmen. Sniping scope is a good accuracy feature of Shaft, and later modifications are monstrously potent. Oh but actually, these two guns are equal. Tier 2 guns are meant to be equal, which includes Thunder and Shaft. It all really depends on the tankmen's style of play! 8) Personal preferences come into play when deciding tier 2 units. I would also choose wisely based on map as well... Since it is not very wise to bring Shaft to a wide open area, or a Thunder to a cramped space where you can hit yourself. But really, choose what you will. It does not matter in the end, as long as you are good at what you use and you enjoy using it.

Merdinho, if you do not wish to retract your application to the contest, then for the sake of the fairness you want, you should upgrade your Wasp and Railgun to M1 at least. That way, you will not get annihilated, though you might still not win first place. Wasp and Railgun are fairly cheap to upgrade, especially first Modifications. You need only to scrounge up 400 or so crystals to get what you need to stand in the Mosquito Battles for longer than a second. Earn the crystals through battles and crystal boxes if you are not so rich. Do not fret! There are likely many others in your position. ;)