Well, if you do some digging around, you'll surely find that Sawarabis have been discussed a multitude of times, but lemme tell you what I think.
Either go for a full KE defense frame, or go for KE head and core with those TE arms, I forgot name since VD has such genious naming, but they should offer you enough TE to buff PMGs (833TE, iirc), and you should try to have maybe 1505 KE to buff Lampourde, thought they say it's not that good in VD, so that's completely optional I guess.
Leave CE parts be unless you specifically want high camera or movement stability performance from a head, or good firing stability from arms. In terms of defense, CE is usually the least of your problems as a Sawarabi.
Which brings us to the next thing.
Sawarabis. They're fast. Ridiculously fast. Surely you've seen videos of Kumorabis on JP? Maybe a Sniparabi? Yeah. They don't need CE. Barely anything else, if the Sawarabi's pilot is good and it's opponents are not, and even when the opposing side is good, just the sight of Sawarabis probably makes them want to get drunk and hang themselves on the spot.
If you wish to use dual rifles, some other LRJ legs with better turning (and defense) might be a more preferable option, as Sawarabis are generally used for either:
1. Murakumos. Sawarabi's high speed, with proper timing, gives those kumos an insane damage boost. Add to that Murakumos' short after-attack delay time with the legs' speed and jumping capability, and you have a build that's theoretically impossible to hit with low-muzzle weapons that also has the potential to 3-2-shot, in extreme cases, 1-shot opponents. Go further and add either plasma missiles to deal with quads (Where did I get this idea, I wonder?), or CIWs to deal with the few missiles that might hit you, and finally, a pair of KE and TE shields to further guarantee the legs' near-invincible being.
Two Cycads, a pair of subcomputers, a glance or a long range FCS and you're done. Like I stated above, Sawarabis are fast, making it difficult to hit them, so using snipers allows for the Sawarabi user to deal reliable poke damage at a range, pretty much guaranteeing they won't be hit by anything that's not either a sniper, sniper cannon, laser cannon, laser rifle, or a rail cannon. But only Goats use rail cannons as far as I know.
But there's more! Like on a Kumorabi, adding a KE and a TE shield can help you against those high-muzzle weapons. Only remember that when your only source of damage is KE, as a sniper, you'll want to count on your teammates dealing with any KE shields your enemy team might be using.
If you want cool points, replace a shield with a murakumo, so that you can both snipe and melee people. A murakumo will also deal with KE shields as well.
That being said, Sawarabi legs aren't very suited for anything besides hit-and-run tactics, or shooting from afar, unless you want to get creative.
Sawarabis don't need much defense as they're so fast.