Eclipse or Guardian for mechs and disc launchers for a weapon (any mech works). I don't know if it's just me, but surge seems more vulnerable and takes more damage while in dash or stealth mode. Maybe because it's dealt more back damage 🤔🤷‍♂️

It's exactly that. I usually pop crits on Surges when they dash because my Javs and Helix redirect to hit from the rear. If you can time it right you can kite one to death every time this way (unless it's maxed out)

Stealth mode on surges and eclipses isn't working for the most part from what I've read on Discord. Not supposed to be able to track targets and still hit them once activated. The aoe radius is too small to deal any sort of real damage but the weapons you mentioned are hitting directly. In the real world, if something disappears from radar while missles are already in the air, they'll hit at the last known position, not continue tracking the target.