I didn't like caluurion on my magsorc, the ball thing is too easy to dodge at range.

Making a PvP build is completely different than what you are probably used to. In PvE you either need damage, heals or defence to at least be able to fulfil a role. In PvP you will need everything, plus mobility as well (unless you will be playing in an optimized group, but these builds lack the ability to fight alone).

Since you will be playing a magsorc, the king of mobility, it might be smart to make use of that. Forget about about a build like what jaws listed, that will only get you killed. The best defence is NOT offence. Of course keeping pressure on your opponents is important, but you will only be able to kill people if you not die in the first place. Make good use of your environment, keep your buffs up all the time, make sure you don't run out of resources, keep your health topped and look around what is happening. Magsorc has powerful burst combinations, so try to line these up to drop the opponent to execute phase. Then you should keep the pressure high and finish soon with another combination, or your opponent will recover and go offensive. Or worse, you spend your resources and die. Sustain > mobility > damage.

For your skillbar you want at least skills that do the following things: spammable/interrupt, stun, mobility, burst damage, shield, heal, buffs.
Spammable: I would go for crushing shock, since it has an interrupt and you won't waste it when you won't be able to light attack due to lag or shoot into the air (ele wep).
Stun: streak. No discussion possible. It is your hard stun and your high mobility skill in one. It is one of the best skills in the game but quite expensive. Don't overcast it unless you really need it.
Burst: frags and curse. Often used in combination with a stun like streak, an burst ultimate like meteor and an execute like fury (fury is usually a noob killer though, use it if you find barspace but it is not a must).
Shield: this patch I would use both empowered ward and dampen magic.
Heal: depends on the build. I think malacath is a must so no surge, but else it should be one or your main heals. The healing matriarch works on malacath builds. Don't forget you have shields, so usually one heal should be enough.
Buffs:
- pet: very strong LoS tool. Makes it harder for opponents to target you.
- dark deal: Sorc has bad sustain, unless you use this, then it's great. Has a cast time so cannot always use and very dangerous on a pet build (still both dark deal and a pet are worth slotting at the same time)
- boundless: speed buff, resistance buff and lightning for enemies that get close. Strong skill, I would never slot chudan to replace it.
- spell damage buff: either degeneration or surge. I use malacath so the heal of surge is useless, thus I use degeneration for the extra pressure, like it.

For the weapons I would go with inferno/resto if I were you. There are Sorc builds out there that use s&b backbar, but for learning the class and sustain resto is definitely easier. Also this means you don't have to spend cp on block cost so have more for dodging.

For food and potions use sugar skulls for the extra stamina and immovable + magicka potion. Since you want high magicka for your shields I wouldn't use something like witchmothers. High stamina will save your life.

For sets there are a lot of combinations. Especially proc sets are stronger this patch, but with stat based sets you have more possibilities (in cp). Make sure you have at least one defensive/sustain set and at least one offensive set. Offensive could be necropotence, crafty alfiq, a spell damage set or a proc set (proc set = meta now). Good hybrid sets are amber plasm, shacklebreaker and bright throat. Defensive set depends on the build. Monster set I would either go with balorgh or engine guardian.

Myself I like to use malacath and a monster set, so that means one 5 piece or sets that can be backbarred. Lich is a good example of such a set.