Guild Wars 2

Old returner, played on and off as an engineer one trick since release, decided to make a new character and looking for a casual guild to join. I’ll be playing casually, so I’m just looking for a small, happy little family than a group of competitive people who must get all raids done before the world ends.
Currently, I’m on Saefar’s Rest, but I can swap anytime if that’s an issue.
GMT+0.
IGN: Oddie Rld or Overcopter, in case I get back on my engi.

Specifically, the Zodiac set.

So in which situations should I be using grenades over the mortar or vice versa?

..and I’m quite lost after all these changes. It’s been a few days (almost a week, actually) since I’ve been experimenting with all the new stuff, especially the new mortar kit. I do, however have a few questions to ask:

Is it me or does the mortar’s dps feel kind of underwhelming? I’ve been running a power build with it and it just doesn’t seem to be all that useful apart from the loads of combo fields that no one else seems to bother blasting.
Can it actually replace the nade kit when it comes to dps?
Speaking of nades, which I just loved prior to having a long break before, how are they specced now? Which runes should I use? Are they better off with a condi dmg build or a power/precision build?

All of this is with WvW in mind.

I am actually astonished. After reading the forums, I just cannot believe it, the entire community is complaining about engineers now?
Did they get buffed or something?

I remember when I used to play everyone deemed them as useless, I even got mocked by several parties for farming for my endgame set on my engineer. What happened?

Hello,
I’ve stopped playing GW2 at around february last year, if I’m not mistaken.
Anyways, after one and a half year, I wanna play this again, but there have been so many updates that I’m just lost in all of this.

Now, I’m not asking for a list of stuff, because I can read the change logs myself, but what I am asking for is some help on a choice.
Back when I played, I had an engineer (my main) reasonably well equipped, and then I made a new necromancer, which is barely level 20-30, iirc. All I know is that I had a lot of fun with those two classes in particular, after spending about 1 to 2 days trying every single class on my first moments in GW2.

There have been a ton of changes, nerfs and buffs so far, and I’d like to ask you guys what you think about necro and engi right now, because I have no idea who to start with anymore. I just love every aspect of the game, be it sPvP, or PvE, but I never had a chance to play WvW because I lagged a lot. Now, though, I will be able to, and I probably will spend most of my time in WvW and sPvp after I’m done or tired of farming.
So what is the current state of necros and engies on everything? (dungeons, pve, wvw, spvp)
Did their main builds change? I remember my engi was running on a grenade power build and my necro was something like a well..condition..idk, something with wells. pretty sure it was a condition build.

Which of them would be better at somethings than others?
I know I could just try it myself, but I would if I could. I’m still waiting for my PC parts to arrive so I can assemble them, and that may take a few days, so I might as well plan this stuff ahead.

Thanks!