And your mech current set up? We need to know full mech set up.
Now, just to start..
1- Those legs and the siblings are the best in town. You can max that leg all the way. 
2- 
This torso it is a torso that require a lot of cooling and energy regeneration to make it work properly and for that, normally will need decent modules. Having very lack of modules and modules that you are showing, those does not help in cooling and regen. The difference is that provide ok HP and the energy and heat caps are the best in the game at natural state and help also a bit in output power of heat weapon.
Few pictures on differences.
As the mech progress to Myth status, the cooling and regen did not improved. If compare with WINDIGO torso as an example, regen and cooling went up a lot. Sure, the energy cap and heat cap went very high. 313/401 and WINDIGO is less. The tradeoff is the energy and heat natural in the torso vs regen and cooling compensations. Both torsos are close in weight so can be exchange without issues.
Other factors are resistance. The resistance is much lower and balanced and Windigo is stronger to be killed having better resistance and HP are close to each other just in this case my Battery it is not divined which will add a few more.
Below, it is my test mech set up for data collection to see what the game does as one of my game fun. As you can see, it does have same legs and torso. I use that drone for test, and I change modules after some data to make it weaker or stronger and check capacities. This is one particular set up. The heat and energy caps are easy to reach and cooling and regen required a lot to be in average. Changing to Nightmare it is different.
or NAGA all with the same set up.
In other words, Battery torso is less useful in the long run in combat having a lot more to compensate but useful to some degree starting. It was my second torso go to and use it because was a new release and wanted to test when I was a new player maybe a month ahead of you. It is more difficult to use the torso but can work a bit later on with better modules.
Using some of your modules showed but not knowing what you are currently using,
That put the mech in a bad shape related to regen and cooling. You have a bit more but way low. Any energy attack and heat attack with drain you and will paralyze you. You won't be able to use side weapons because killed your energy and can't recover and or overheated attacked or using your own weapons because generate heat during the use.
You can work in the sideline with this torso and enhanced to myth if you want. It is a torso that can help you out maybe better in the long run. Even though, you can use current torso and get into L40 and keep it at that level for now. Legs can move forward in full, and heat and energy side weapons can go in full but if you have 2 similar in energy or the mix one for energy, go for energy dual attack. Those can be obtained in rare or epic farming.
Those basic modules will need to be enhanced and transformed to EPIC L30 because not having basic ones that can go to myth. The investment has to happen there in full even are trash parts for meat but for now, it is the way to go.
You can keep asking questions to the forum, they can help but sometimes takes time to respond. Just use the information to Analize. Don't do what I am telling you. Just think carefully and do not rush. Players are always rushing damaging their progress. Relax, think through and remember, it is a game for your fun and use what makes you feel the fun.
Ah, you can max this one too for now to L40 until can get ideas and will help in different areas for now. Max the drone if is compatible for the combination to max one side type of mech
