In my oppinion NO weopon is better than any other weopon. Each is extremly useful in the right situation even though some situations pop up more often than others.Here are some of my favorite ways to use each weopon.
Blaster: Its hard to dodge with lots of Fast Fires and it becomes more lethal with power up.When you jump continusly the stream of bullets becomes hard to dodge. usefull in wide open lvls like diamondus warzone(unfortunatly there isn't any fast fire or the blaster power up there)and in tunnels.
Bouncer:Very hard to avoid in small spaces as it bounces off the walls and around the area alot.It shoots upardly very far wich can hurt opponents who arent even on screen yet. Also good in tunels.
Ice: Hundreds of uses if you think about it.
(Still needs to be tested)Sometimes when theres one ammo left of ice it fires it AND the next weopon SIMULTAINIOUSLY! that can hurt people lots. Also if your a good shot you can freeze oponents in the middle of blasting them with other weopons(seekers work well here).This too is useful in tunnels.
Seekers:People use this so much and you ppl probably know most of its uses so ill just contribute this its EXTREMLY good in corners and other confined spaces or in dark lvls.
RF Misseles
ard to aviod when shot excessively.... Hard to avoid period. there Really fast (thus the name) and become faster when your running. the fact that it shoots 2 or 3 at a time can devestate wide areas and can many people at once.not useful in tunnels cause of the recoil.
Toaster:the more fast fire you have the farther it shoots.its hard to predict the way it shoots because...err i cant really describe it but im sure you all know anyway. also it burns ammo slowly (pun not intended) so you can shoot with it for a while.
TNT:Great for blasting through walls and spreading around ammo. can destroy things in a 4x4 tile area around it and ,if used correct, can knock opponents back away from chasing you. explodes when shot.
Pepper spray:as it has been pointed out alot its more or less hard to see. it shoots out 2 at a time and can shoot diagonally which can devestate different playing styles. so what if it only deals one dammage, you can combine it with others if you wish which can hurt alot.
ElectroBlaster:Shoots through walls. Shoots farther when running. extremly useful in many situations such as blasting people in the carrot area in Diamondus Warzone. or getting the seeker power up in Chemical warfare.
Now theres a bunch of stratedgys and great uses for each weopon Proving of coarse that cows are cool! Errr i mean all of them are good in the right situation. So Nya! =P