No one running sites in a wh is invisible. I hit d-scan and see some wrecks. I hit d-scan and see a different number and/or kind of wreck - I've got you.

You're invisible until you create wrecks. Running pve sites w/out creating wrecks is a real challenge.

Not a recon, but have you considered a Stratios? It can run DED 4, fight back using neuts and drones, and operate easily in low-sec.

Just a data point about wh pve. Sleeper npcs drop blue loot in their wrecks and have decent salvage. They don't have bounties. If you plan to just shoot the sleepers and then their wrecks - you wallet isn't going to grow all that much. It's different than k-space pve.

For our C4 home sites any pair of marauders (no kronos) can chew through them and survive. Bring 4 and you're down in th 5 min/site range. C4s are weird though - all the spawns start at over 100km from the warp in. One of the sites is mostly frigs and cruisers - there are better ships than marauders for that one (gilla, sleipnir and so on) because of the high number of frigates vs marauder tracking. Smarties help!

For C5s they are doable but a little ballsy. Again, the more you bring the quicker it goes. The fits get a bit pickier as the alpha goes up. I do C4 in a pvp fit and hope for something "bad" to happen. In C5 sites the sleeper nuet pressure is a lot higher as is the alpha, so you have to dedicate your fit to pve.

C3 and lower I wouldn't bother putting that much isk on the field. Marauders are less efficient as the number of BS per wave go down. C3 - command ships are great. C2 - drakes! C1 - Slingshot and a circus pony will probably work.

C6 - no idea. I would assume too much alpha AND to much neuting for marauders to survive.

They neut right through bastion. It's serious stuff. c5/c6 are more difficult than the high end incursions. If folks are soloing them, I haven't heard about it (I'm not big on elite pve, so me not knowing doesn't mean it doesn't exist). Google for vids / a guide - it may be out there.

The vargur specifically - you'd need to pop a mobile depot and swap fits on the fly to manage range/damage/tank issues. You flat out can't hit the frigates once they get in on you. I'm lazy and impatient, so I run golems and it's pve in easy mode (even w/ the golems in come gank me bro pvp fits). I suppose you could MJD around and make it work, but if my guys corner me into doing pve - I'm a sit and smash them kind of girl. The golem is just in a really good spot right now.

Neuts aren't considered 'EWAR' for the purposes of 'EWAR Immunity'.

Bastion, Triage and Siege modules won't stop it, neither will being in a Titan. In fact, heavy neut platforms are an integral part of combating capital and supercapital ships.