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it depends on what you want for it

Sweep
Item: Choice Scarf/Life Orb
Ability: Adaptability
Nature: Modest/Timid
Tri-Attack/Hyper Beam
Ice Beam
Thunderbolt/Shadow Ball
Recover/Agility/Psychic/ Recover (LO only)
EV: 252 Special Attack, 252 Speed
What i truly use is a porygon2 for its massive bulk with evolite
Bulk
Item: Evolite
Ability: Download (free +1 special attack is always nice)
Nature: Quiet
Recover
Thunderbolt
Ice Beam
Trick Room/Psychic/Shadow Ball
EV:128 HP, 128 Defense, 126 Special Attack, 128 Special Defense

Whats great about this is that you can survive a choice scarf outrage from a haxsours and have more then half heath XD

unfortunelly its hidden power is electric, im probably going to use him in a mono type team so i was wondering if i should include shadow ball for ghosts and physic for fighting types?

And btw, you could actually throw Psychic over Trick if you want to take care of fighting types. Though, Ghosts lose their STAB against you too, so it's kind of a fair trade. Also, you wouldn't want Shadow Ball and Psychic, cuz then you'd have to drop Ice Beam or Thunderbolt. And you'd lose a lot of coverage if you did that. And if you did Tri Attack/Thunderbolt/Shadow Ball/Psychic, Steel/Ground would wall you pretty easily. If you go for Tri Attack/Ice Beam/Shadow Ball/Psychic, Steels in general would wall you. And Normal/Ghost/Psychic is walled just as easily and easier by Steel. So, really, the only move you would want to replace is Trick, if you need help with Fighting types. So, you can throw Psychic over Trick if you think that would help you. Though, a Scarf on an unsuspecting tank/wall is very crippling, and can be very valuable. Not to mention, a STAB Tri Attack from this guy can revenge kill most any fighting w/o priority. And Priority would just nail you anyway. It's up to you though. Good luck.

it was meant for the porygon2 set

Yes, I use Trick on a lot of pokes with Choice Items. It's mainly for special walls like Blissey in your case. You won't be able to really get around Blissey too well, so Trick the scarf on her if you get the chance.

I actually use Trick on my Specs Starmie, which can be devastating too. Starmie has the raw speed to outspeed most everything, or at least many important things (Gengar specifically), though its special attack is respectable, though somewhat lacking, so Specs solves that very quickly. And it's always fun to Trick it on to something like Hippowdon or Gliscor. Though, more realistically I would just Ice Beam Gliscor for the OHKO. I actually hate when something on my opponent's team has Trick, because they don't just have to give you a choice item or something useless, they can end up taking your item later on. For example, taking Eviolite from its users like Chansey, Dusclops, & Porygon2 rendering their walling capabilities nowhere near what they would be.

One more thing I wanted to mention, if/when you Trick the Scarf on something, Thunder Wave might not be that useful here. You might think it could help, but you wouldn't Trick it on a sweeper anyway, your goal is to hit a special wall, or wall in general with it and even if they outspeed you, they probably can't do much if anything at all. In which case, Thunder Wave might just be wasting a turn, because once the wall can only use one move at a time, so they'll probably be locked into a move they can't use again and again. (Like Stealth Rock/Recover and other useless things) Basically, Tricking a Scarf onto a wall just makes the wall death fodder and practically useless, because they can't stay in, which is the goal for them. (Stay in and tank hits) Not sure if I explained that very well, but if you Trick a Scarf onto a wall, it can't do much of anything for the rest of the battle.

EDIT: Your welcome.