User blog comment:EmperorArietem/HEEEEEEEEELLLLLLLLLLPPPPP!/@comment-1071767-20140420174251

Honestly, practice and gaining PvP experience is pretty much the only advice you can get for Dark Souls. Get a better grip of what strategy you want to employ and really get the hang of your character and his/her arsenal. You'll also need to be able to quickly analyze what your opponent's strategy might be, based on their movements and visible equipment, so at least being familiar with what the other weapons and spells do is a big plus.

For example: I use the Greatsword (an ultra greatsword) so I naturally get countered by faster builds and caster/ranged types. Knowing my weaknesses, I cover for them, equipment-wise, by having a ranged secondary weapon and/or pyromancy (which only needs attunement slots to use). I also watch out for tight areas since these areas can turn the ultra greats' good reach and horizontal swing against them.

Invading a world where the host fights you with backup happens so welcome to Dark Souls. And there's no guaranteed solution to lag as you really need to account for it when you move or attack, especially with large weapons.