Question about summoning 100+

I just recently started a NG+
atm I'm SL 128, I read the summoning guide which described locations and their appropriate summon level.

Am I to understand that the chances of me getting summoned are next to none soon?
Cause I'm a sunbro and I don't really do invasions...
On that note, what is a good way to gain souls after a certain level? Cause I did notice I get summoned a lot less frequently...

~Vorcan~

With SL 120 range you can get summoned anywhere, but it will usually take more time, than what you're used to on lower SL. Do note, that many players will summon you to gank invaders, especially in later locations.

If you want to get summoned for bossfights try one of the Four Lord areas. Duke's Archives, Tomb of the Giants, New Londo and Lost Izalith/Demon Ruins.

Lot of players want help with these guys, especially Four Kings and Seath. Other than that, I'd suggest DLC areas, there's always a lot of summoning there, but be carefull. If you get summoned in Township, chances are it will be for gank, instead of boss. I find it best to place a summon by Artorias's fog, that way, people going for him, or Kalameet will summon you and there's little ganking done there.

100-125 for cooping.

I earn the most souls with pvp and get lots of action with my SL250

Only place I get reliable, relatively quick summons above sl 100 or so is 4 Kings. Easy to get summoned there all the way to about 170-180. My 159 just passed 50million souls, all of which is Kings co-op.