Hjoyn

I've been building some heavy lifters to get mass into orbit, and I've been using hybrid thermal turbojets to do so. However, after reading some of this forum I hear that the ATILLA is way better. I did some quick tests and it seems to be good, but I haven't been able to get it quite up to the level of thermal turbojets and their air-breathing ability. My goal is to get 100-1000 tons into orbit at once, with minimal cost. I am using FAR, so I can't just bring up absurd payloads. The main problem I am hitting is that any super heavy launch platform is way too expensive per launch to use in career (which is what I am designing for) or if I use cheap chemical rockets, the whole thing is too intensive for my meh computer. Because of this, I designed it as an SSTO with atmo flight capabilities to land on the runway, but it is really hard to fly and only lifts 100 tons. Any and all tips/advice are welcome, even if I am going about this completely incorrectly. Here is a pic on runway: http://imgur.com/CLjMyoi , and download is at: https://www.dropbox.com/s/z4kbq5c88vu7ot3/Heavy%20Lifter%20Hybrid%201-Kerbin.craft?dl=0 Parts Mods: KSPIE Mark 4 Spaceplane Parts Kerbal Foundries Infernal Robotics Infernal Robotics Model Rework-all modules Quantum Struts KW Rocketry Procedural Parts B9 Procedural Wings Adjustable Landing Gear Action Groups Extended (I do have more action groups through this, though you probably can still fly it without them) Mechjeb for all (I don't know if this affects the craft file, so if it does its on here) FAR (Its built with this, so it may only work in it) It runs on 2 3.75m fusion reactors with hybrid thermal turbojets. Fly to 20k and 1km/s, then pitch up and switch to nitrogen to get apoapsis >70k. From there you need to use fusion engine and hydrogen to get into 100k orbit. RCS is a huge power drain due to only charged particle generators, and are really only for docking. I would appreciate any feedback on this and on how to achieve my goal.