I'm certainly not trying to tell you how or what to play, but you appear to have a defeatist approach to this. If you aren't enjoying yourself you may need to step away from it for a bit and find something less stressful.
"9/10 packs crashing for no reason every 10 seconds" is either exaggerated, the packs are not unmodified mainstream packs, or your computer setup has some really serious issues.
I could, with a high likelihood of success, randomly pick 10 packs off the FTB launcher, install them and play them *as they were packaged* with a much lower failure rate. If I then went in and added or removed things without fully considering how those changes might interact with the pack I installed, I could very well encounter failure rates coming close to what you mentioned.
However, in that case, it isn't the pack that is the problem. It is making changes to the pack that is the problem. The solution isn't to throw my hands up and give up. The solution is to come back on here and say something like "Hey guys, I just installed the DW20 1.7.10 Stable release, I tested it and everything seemed fine, but then I added <insert favorite alternative mod here> and things started blowing up left and right! Can anyone help me figure this out? Here is a pastebin of my crashlog as well."
I'm not trying to add to your stress, I'm trying to show that your recent post history isn't allowing for people to provide potentially helpful advice, much less even attempt to assist you.
With very few exceptions, mostly 3am porn spammers from somewhere overseas, the people here can be remarkably helpful if you give them a chance.