Managers never last too long, as drama comes in to play.
Just like my former manager on SYM, Molly Holly. I was in HeAT then. Once I defeated DDP to get into RAW, Molly said that I didn't need her and quick-quack-boom I'm gone and now on RAW.
Factions last WAY longer than managers.
My faction, the nWo, lasted until WrestleMania XIX. All I had to do was this:
Make my faction (of course). It consisted of me, Steven, John Cena, Rob Van Dam, Big Show, and Lita. I kept on winning tag matches and losing every now and then in singles matches. So here comes Armageddon, and guess what? I'm in the Elimination Chamber! ! And ya really wanna know who else? Triple H, John Cena, The Hurricane, Brock Lesnar, and Shane McMahon! I maxxed Shane's stats out too! Just so we're in the same book, Shane McMahon was a created character. So I'm in there, and I'm still at like 80 somethin' stat average, while most of the other people are in on like 90 or over, especially Shane, whoes on 100. I win, luckily. Then they gang up on me and Shane joins the Corporation (faction). In the Royal Rumble, I win. I knocked out the Big Show, a member of my faction, as the last one. So now I gotta negotiate with him & Stephanie McMahon. I win the negotiation by arguing without a smart attitude, and I get to go for the title at WrestleMania XIX. At WrestleMania, I press L3 down ALOT. Then my whole faction comes, one at a time. In exact order, it was Lita then Big Show, then Rob Van Dam, then John Cena. But while Cena's out there, Vince comes and leaves then Shane. I get beat up but then I reverse Brock's special (he was champ) and then I do my Stone Cold Stunner 2 and then the F-U. Practically kills 'em. To the pinfall, a 1, a 2, and a 3. I win. I'm champ.
Hope my storĀ”es helped!