Well, I think the 2 tips I gave on the Trail Blazing (1st page) should be enough, but if it's not, I guess you just have to be persistent.
Also, I'm surprised you have trouble with Escort, I thought that was probably the easiest. Here's some things I do/try-to-look-for in Escort:
- While your sedan ain't a speedster, it's still a hell of a lot faster than those vans, especially when you floor it and get it up to top speed. (And again, the "Nitrous on all vehicles" unlockable should help, though I can't remember if it's disabled during Escort. I remember it not working during some diversion, just not which one. I know it worked on all the Trail Blazing ones, though).
- And where's the easiest place to floor it? Long, wide, roads. Use your map to find the nearest one, plot a course, then floor it as long as the road will let you, then pull up your map and do it again. Or just pull a quick u-turn.
- Plow through the van-blockades (but at least
try to go for the small gap in between the vans). For some reason, the Escort car is freakishly strong (might even be indestructible, I don't remember if I ever had it blow up on me).
- Got vans close on your tail? Remember: they follow your path fairly closely. Switch over to the oncoming lane, and go for "near misses", and sharp(ish) turns immediately after. They'll try to cut that corner, which sometimes means hitting the car you just went around, stopping them dead, giving you time to get some distance.
- When you get a special request (avoid the other client/spouse, kill this person), do it soon. Until you do, the "pleasure" meter won't go up (I think). HOWEVER, you don't HAVE to do it immediately, there's no countdown. So you can wait 'til it's safer (circle the block to get distance between you and the vans).
Hope any one of these can help.
EDIT: Or, you could (if you have Steam, and a legal copy of the game bought through it), you could try going co-op, but I've never done activities in co-op, so I don't know if the game would actually let someone help.
You could even try it with me personally:
http://steamcommunity.com/id/benswami
Add me as a friend first, so I know when to expect you.