I only have 5k tokens and no rewards yet what should i get first. I was think longbow sight

Yeah, I'd say longbow sight is probably one of the best. I also saw some people doing pretty well with that amulet of zealots or whatever it's called in clan wars. I've never actually tested them myself despite being f2p for so long I'd much rather save my tokens to use on members items.

There really are no "best" rewards, it really depends on what you want to use them for.

 

The longbow sight is good for PvP, but slower for training than the maple shortbow.

Similarly, while the Gravite weapons are excellent for PvP they give almost no boost to training (I seem to recall it's only an extra 200xp/hr)

 

The coal/gem bag can be useful for Mining/Smithing training, but since the introduction of the resource dungeon in the Dwarven Mine the Gem Bag is decidedly less useful.

The scroll of efficiency can be a real money saver if you plan to train Smithing by making platebodies.

 

The Arcane Blast Necklace and the Tome of Frost give the best magic boosts in F2P.

Gravite 2h is good for f2p pking...

 

But f2p pking is just lame. (Sorry! It is!)

 

I'd get scroll of efficiency, coal bag and longbow sight, just because they all have practical uses in P2P, unlike the other f2p rewards. Any additional tokens should be saved for when you become a member and want all the awesome rewards.

 

Edit: Oh dear just saw your username... Probably not thinking about becoming a member... Oh well.