raxo2222 You drive a brick.
Don't connect one tread to another, when a complex part is destroyed by rail 50% of the damage transfers to the next block and when destroyed by plasma 80% of the damage transfers. (For that matter, move your guns off your treads)
Under-teired blocks are ok to have if you need to use them in order to make your bot wide/long enough to accommodate your movement/weapons. (The bot I got into tier 10 with had tier 5-9 armor because I couldn't afford all the upper tier stuff) Just make sure you have a skeleton built of your strongest blocks and you can use the rest as filler material.
Your back SMG is fairly useless since most of the time it will be blocked. If you position yourself so that it's not blocked you're either on an incline and overexposed to shots or turned and the SMGs on two of your treads will be blocked.
Here's the bot I got into T10 with. (A little after I was in that tier since I don't have one without the T10 blocks on it.)