New to NX, Veteran of LR: Help?

[ArdentSoul]

So, I purchased Nexus some time ago, but have never played it.

*I HAVE ALREADY SPOILED THE STORY; SO SPOILERS ARE WELCOME*

I started Armored Core at AC2, then AC2:AA. After that I played AC:SL, AC:NB, and finally AC:LR. After that Armored Core for PSOne and AC:MOA. Finally AC4 and AC:FA. Essentially everything EXCEPT Nexus.

Note: I only used Nine Breaker for a file conversion. It was cheaper than Nexus... I found out why later.

My question to the veterans of the forum is not-so simple, but comprehensive and straight forward.

1: What are the differences in heat-energy management. I've booted up the game and realized I had 10,000 EN Supply. In LR, 4,000+ was extremely good, is it roughly double, or not?

2: Starting AC from scratch? I like mid-weights... a lot. More than I'd care to admit. However quads and light weights are my favorites, what are practical short-term parts. (Generator/Radiator/Booster combos also acceptable, as they're most important early on.)

3: Notable weapon differences? Anything garbage in LR that is good, broken or at least usuable in NX? The MG is a given... as it's on another thread.

B: Not needed, but, are Ground Torpedos not impossibly useless here? I like them, but they suckin just about every game. Also, are bazookas also really bad in NX? And the save mechanic. Please... please explain this. It's soooo weird...


Aside from this, any and all tips and input is welcome. I have just never played Nexus, and what little I got from playing around told me this was quite different.

Thanks much in advance.

P.S. I got my very first new laptop! Ever. *I come from poor people, and live in America.* So I disappeared from everywhere for ungodly amounts of time as I explored the wonderful world of non-DOS technology.