Can anyone tell me at what level I go up to class after Omega?

By the way ...... does anyone know how to find where you are on a particular weapon's xp?

The only place I can ever find it is after a match I see the xp for that weapon, but thats the only way I know.

If you go to barracks and challenges it tells what challenegs yoou have and need to complete, and if you choose class it tells what weapon level you're on, but I cant find anywhere to pick a random weapon and see where I'm at with it.

You can go 'Unlock Gear' then pick the item you want forever (across Prestiges, yes. You can use it as soon as you can create a class at level 4). After going to 'Unlock Gear' the item categories come up and you can choose what you want.

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I'd also recommend a Custom Class or two, or five, but perhaps after you unlock something to make further Prestiging easier.

Anyone interested in playing as a squad can add me as well. I'm in Australia though so linking up outside of the weekends can be hard if you don't live in Oz. I bought the game on release but just started playing it. So I need to level up all the classes
and am quite happy to play whatever class the squad is missing.

prior to going into race if you hit blue x button it should tell you class and restrictions and it should say the class on the race prior to clicking on the race also if you need more then that i would need to know what driver level you are at

No. To find Omega Shenron you go to Central/West City and fight Gotenks. After than Omega Shenron should show up to fight,.