I did 2 hours of invasion yesterday. My build is not made for that but I enjoyed it. But the spawning is sometimes really awkward and annoying. In the open world it's usually fine but in dungeon it's really weird.
Like sometimes I spawned at the very beginning of it and 2 sec after "Host has enter boss room"... So why put me at the very beginning if the host is in the last part ? And sometimes it was the other way, I spawned at the end of it and host is at the very beginning so I have to traverse everything.
You're always end up in 1v2/3 situation but it's funny how people are not taking any risk. In addition, they very often had endgame gear (like the weapons of the final boss, despite me being RL 35...), remove 90% of my HP in one hit and me doing very little damage to them. But they always try to bait me into place where there is no enemies and try to "pince" for backstab.
BUT in my book, invasion is a game of patience and I am VERY VERY patient. Also as an invader, I am here to make you life difficult and every dirty trick is allowed. Don't expect me fight clean and running into a 1v2 situation. I always hide, back into enemies and wait till the host and their cooperators decide to come to me. Because the host has to advance to complete the dungeons... so it's always their loss if they decide to play the waiting game.
It's usually not my style but in Soulsgame , when it comes to invasion, I am a bit sadistic. Win or loss, it doesn't matter if I annoyed (by hiding, slowly reducing their HP, taunting them with various emote and others stuff to bait them out...) them long enough it's a win for me. Especially if they use "OP" build xD
It's a bit more complicated in the open world but I had some good session also. One host and his coop, didn't want to take any risk and always tried to backstab when I was fighting the other. So I run and they chase me for quite a bit till we came across an land octopus (in Liurnia). Then the waiting game started. For something like 15/20 min, we tried to bait each other out. Finally I decided to take some risk to bait them into my Octopus friend. I was low life so the coop thought he could kill me. I run into my friend and we took could care of him. The host followed just after, probably because he thought I will not survive (I was one hit away from death).
So yes, invasion is a bit love/hate but in the end I somehow always enjoy it. Just the spawning is sometimes annoying.
EDIT : I am doing a INT/DEX build, "Swordsman with magic" kind. I love the Magic Glintblade spell. It's the first from the Prisoner class. You create a magic sigil in the air and something like 4 sec later a magic sword fly to the target (chosen at the time of casting). The cool part is that you can use a charged version which increase a lot the delay. It's nice to mixup opponents, mess up their roll timing and keep them under pressure while you run at them. I don't get tired of seeing them panic roll till the projectile goes out.