I'm on PS3, so I'm not sure if everything around co-op is identical on Xbox, but I guess it is.
Ashran wrote:Should i move to other area?
With SL 70 you can try one of the Lords areas. Duke's Archives, New Londo and Tomb of the Giants. I wouldn't recommend Lost Izalith, it's pain to play there and the boss is terrible to deal with. You can also go to Oolacile, I bet you will get summoned a lot for Artorias and Kalameet.
Once you reach SL 80-85 You can get summoned by the many SL 100s on NG+ in many locations.
Ashran wrote:Should i lvl up some dex?
Level up whatever you wish depending on your playstyle.
However, with 50 Faith, I would just use elemental/divine weapons and leveled up Vit and End. With 16 Vit you must die in a few hits and especially DLC and NG+ bosses hit hard. 18 End hinders your melee options and Claymore eats a lot of Stamina per swing.
Unless you want to go up to 100, or 120, I would leave Str and Dex alone, just to meet minimum requirements to use your favourite weapon.
Ashran wrote:Its my SL good for coop?
Each area has it's own best co-op level range. When your character is in that areas SL range you usually get summoned very quickly. If you get summoned a lot, your SL and your area are good and you can stay there. If you don't get summoned at all, either level up, or move elsewhere.
Once you reach SL 100, you can co-op with people on SL 80-120, which covers most PvP players and I bet they will want help with NG+ bosses. My very own SL 100 gets a lot of co-op and PvP action...although I'm considering his deletion, or leveling up.
Ashran wrote:Tips for Sunlight Knights?
Go to NG+.
This is just so you know the strength of NG+ enemies and bosses and don't get destroyed by them when a host summons you to NG+. If you're familiar with NG+, there's no need to do this of course.