Gaia

The 14% looks about right given the figures and the 1% looks to be about 1.9% so truncated to 1%.
However windows struggles when trying to find free space with that little available - especially if the disk is fragmented and I would expect it to be given that defrag will probably fail to complete in anything less than a month. This will have a major impact on performance when attempting to write to the disk.
I'd strongly suggest some disk housekeeping is badly needed.

How about any blaster with a mez setting up containment for a team of 'trollers that only use their secondaries - that's about 80 odd % -

remember also that a power supply has its output split between various rails and each of those will have its own max rating.
So it is possible that if you have multiple high current drawing components connected to one rail you could overload the PSU even if you are nowhere near the max rating - check if there are any splitter cables being used and note what is connected to them.

Another possibility is that as you say you are in the middle of a heat wave this is reducing the rating of the psu or possibly the psu fan is failing or clogged.

I'd certainly suggest looking into your system temperatues first and making sure the fans are rotating and clean. Extra system fans are very cheap if you find that is still a problem - only a few £/$/whatever.

USB also limits the power that can be drawn from a USB port so check if you have other peripherals connected other than via a powered hub.

I suspect Arachnos would probably trust the Heroes more than the threats that the Destined Ones pose. Recluse and his Lts aren't exactly known for being the trusting sort - probably got something to do with the risk of being stabbed in the back.
They'd likely see the Vigilantes as just another tool to carry out their aims.

Reformed villains on the other hand would expect to see a lower level of trust than their new hero friends.

Theoretically it is possible with 3 (2 can meet but not exceeed the threat ratio requirement) however they would all need to be extremely high damage to maintain the threat ratio at the required level.

Player threat level needs to be >6 times the zombie threat level to spawn EBs
Players have threat 1
Minions 1/3, Lts 1, Bosses 2
so 3 players vs 1 minion is sufficient - the trick is to maintain that ratio

Hint. - GW was caught! - you have fought her before I presume so have some idea how hard that can be so why would you not expect something tough to guard her - I expected an AV the first time I ran it and was presently surprised to find only a Ballista.

I remember the first time I did this and couldn't believe how easy it was running on top difficulty. GW just tore through the mobs but that was on my Dark/Dark corrupter so DN on the Ballista probably made a huge difference.
That bears up on later runs - my Widow which should have been able to handle it easily was two shotted by the Ballista - Hosp and reset before it failed. The repeat attempt downed the Ballista but on low health and GW down to about half then she got hit by the Wardens.
The heroside version otoh can be very nasty - I couldn't take her on my tank as it went - hit her once - HELD, click BF, DEAD. A trayload of purples allowed me to get her down to about 1/2 health before she got the lucky hits in - then quickly dead with her on full health.

Ballistas are very definitely soloable without having to rely on temp pets and there are plenty of arcs where you come across them. The hardest I had was with my Fire/Fire Brute before he had any KB protection where he couldn't get the self heals off so died very quickly but my Corrupter, various Doms and even my petless MM have taken them down solo with varying degrees of difficulty.
Indeed there are many other EBs that are much harder to solo - mostly the downgraded AVs/Heroes.

Rikti Magi also spawn in some RWZ mishes so not just on the ship and they are also soloable - bring BFs if you're playing a squishy.

They do - as long as they are someone else's.
Pedestrians/Vehicles still push you out of their way though - indeed they will push anything out of the way except other pedestrians/vehicles. Makes sense for vehicles but not peds. Of course seeing two trucks phasing through each other doesn't make too much sense either.

Been that way for several years if not from the beginning.

You would hope - unfortunately actual experience differs

There is lag around WW/BM irrespective of whether there is anyone present - This is why I am conjecturing that there may be a problem with the linking of the two servers. Oh and auras especially from powers have a much greater effect than any costumes and it has been suggested before to have a power dampening field around both.

I suspect it does.
Rubberbanding occurs when the location seen by the client and server are out of step. Faster move rates mean you can move further between packets being received at the server. I'd assume there is a threshold distance beyond which you will be rubber banded back to the server stored location so if packets are being dropped somewhere along the route it is easier to move beyond the threshold where it can be auto-corrected the faster you are travelling and so the more rubber banding that you will experience.

oops misread that - the lag is indeed probably more likely due to the location as more information is being sent to the servers - rubberbanding is a consequence of it.

In particular the WW servers operate across all game servers for both EU and US and so is probably being hit hard and the game servers are having to wait on responses from it.

Its best to install both to different folders so you don't have problems when the two sets of servers are updated at different times.

You can just copy the EU folder structure across and download the US updater to that folder.
Renaming the updater as you described should work. I believe the only difference between the two updaters is that the EU one contains the language settings - I'm not sure what would happen if you use non English language settings though. The server group appears to be identified from the executable name so if its called CoHUpdater.exe you will access US, if its called CoHUpdaterEU.exe you will access EU.

Also check that forward slash on the error message