I'm going to just give you an overview. The key points you can look up more thuroughly on BG. As far as gear. Get the KI to participate in wildskeeper rieves. Along the way, while ranking up in coalitions and getting sparks through records of eminence, you should get enough sparks/bayld to put together a pretty decent set of armor to do skirmish/delve with. The progression is very simple. With the help of trust magic you can do a lot of it solo. Right now is a good time to come back. A lot of hype for the WKR (wildskeeper reive) because of the new augments you can get from them.
If you do delve in Outrider/Wayfarer/ Or espial you need to be shot, that gear is beyond awful
It shouldn't be your only set, but it can be useful. Take COR/support, for example. Full Wayfarer set is our best refresh idle set we can get. If you're not shooting or doing other things, you should be shot for not getting 3 extra mp a tick while idle and out of danger. Having the mindset '119 or bust' will just gimp you.