So I'm not too sure about the IS Orions. They feel too squishy to me for what they are. All I have is a Protector, and I haven't been that crazy about it yet. However, there's a sale going on, so I was looking at the K. Came up with this: _
LFE 350 version: compared to yours is -1 DHS (52% cooling efficiency pre-skills and 6.5 alpha coefficiency seems very good for a brawler) and only 3 tons of ammo (30 shots with full skills), but +5 km/h (75km/h total) _ Even then, this build doesn't look great due to crappy hardpoints locations and underwhelming firepower: an hunchback can pack a very similar punch (1xAC20, 3-4xML). The only thing it does better is cooling and tankiness, but being way bigger means you won't last long despite the armor quirks... That's why I always felt orions were very underwhelming in public matches.
This is light armament for an orion. You have way too much cooling - remember you have -10% heat quirk too. You can shave some leg armor - orions have +16 leg armor quirk and nobody, I mean NOBODY shoots orions in the legs. Go with LFE300 or LFE295 (when you don’t need the 2nd engine slot) engines, or even LFE280 for a bit more weight for armament. As long as you go 60+ the Orion will be fine. If you insist on AC20, then you should be able to fit 3LLs or 2LPLs + meds. Personally, I run the K with just 4 LPLs and lots of DHSs - with the -heat quirk you can ignore the ghost heat and alpha away for several times before going into left-right laser pairs punches. The Orion has lots of armor and bad geometry - if you get focused your components will be removed very fast, quirks or no quirks. The only way to make it work is to twist a lot and never stare at the enemy.This is why I like the K - because with my firepower in the arms I can point-shoot-twist much quicker than when I use torso weapons.
Is this the On1-K Boomer I have heard so much about? I really think you have room to fill the missile hardpoints. (go to SRM4s if you drop the AMS). _ You don't have to shoot all the weapons if you start getting too hot.
I could always drop the engine speed and switch to a standard to fit a UAC20 in there... A UAC20 and MPL's usually run pretty hot together (like on a Marauder), but might work with those quirks. _ I'm under the impression that the IS Onion is definitely lower tier because of the bad hit boxes. I still haven't developed any love for my Protector. But I've seen some YouTubers kick ass with them.