I like the combination method best and I'll tell you why.
The first one like we all did in basic writing class to me is the least creative process of them all, but it's one we learned first. It's basic numbers and letters, and indents. I may write linear but this it too basic and doesn't allow much wiggle room. It's point A to the end. It can be set up with your kernel idea, laid out by chapters to the end, or any way you want to lay it out. This helps you stay on task and know what to write next.
For me, I'll update it this constantly. Why you may wonder. I hear you "that's double the work!"
"Yep!" I don't know about you, but my characters are alive in my head telling what they will or will not do or say. It drives almost insane when they wake me up in the middle of the night! My novels evolve as I write them. That's okay if they don't do that to you. I'm the queen of Abby Normal, all hail the queen!
It also helps me write the dreaded synopsis when I'm searching for an agent or publisher later. Why multiple agents and/ or publishers? They have specialized markets. At one time I had four different publishers and two agents. It will also help me write the blurb for the back of the book if I self publish.
By this little jewel of a method, I can keep consistency in my writing. Greg's eyes don't change from blue in chapter 1 to brown in chapter 26. If the character is known to have an Irish lilt in his voice in chapter 16 and switch to a Scottish brogue by chapter 30.
The first story I drew several large printer paper sheets for the whole story. While I love to brainstorm story ideas with mind mapping, I'll never do a full book that way again. I could use it for a dining room tablecloth. I might insert here that my dining table seats 12.
Pantstering is writing without an outline. Flying by the seat of your pants writing style. This word drives my spelling checker crazy. I couldn't keep all the characters straight unless it was a children's book. The only panstering I've done was short stories because rarely do they have much details. Over in Compuserve's writer's forum there are writing shorts monthly. Usually there is a theme given that lends itself to pantstering. I'm not brave enough to try a 50K word book this way, but I do know many successful authors that write this way.
What works best for you is the way you should write. What's your method?
Keep writing and loving the Lord.