Its simple, get to where you can add seekers (round level 10 or so)
Get a Class 2 or 3 body, with a SMALL bit on the very edge, fill with seekers...
Then, just stay at the edge, and fling your "body" out when seekers are charged! The edge (which you can hide in) will protect against ANYTHING!!!
Granted, when the firing gets a little more hectic, the openings to fire off might get scarce, but you have some wiggle room in the "safe area" to move around in.
Otherwise, work out the damage per gun point (slightly factoring in speed) and just stay as small as possible!
Yes! That's my tank! -Well- I added bubbles to make it look cooler because with the shield and the cannons you don't really need to lower hitbox any more.
it's good... I have better ideas but why would i share them with the world and let them take credit for it... Or better yet steal it and own with it....