Honestly, Iamsmart is right, don't play it if you want to succeed. If you just want to set yourself a challenge, then by all means go for it, but pretty much every other route is more useful to an alliance, and is more powerful in solo play.
I played extremist actively one round, and was bored out of my mind. As soon as spies came out, I didn't get a single close tick battle report. Nobody was willing to stay against me for a close tick. I got SA rushed at least a dozen times a day, and I could only ever defend alliance mates if they got online to join me in last ticking. Not to mention that if you're up against a decent alliance, they will learn to send on several ticks meaning you can't defend close-only.
The units aren't even that good at close tick. Fanatics aren't really any better than SAs, certainly not better enough to justify their close-only status. Extremists admittedly do do excellent damage, but they are SO squishy, and the fact that they fire so early means alot of their firepower is wasted on flak anyway, as well as 30% of their fire being wasted on NLD units. And I do mean wasted, because they don't actually kill any NLD stuff.
No battle reports, 24/7 contactibility, half way through the round I got bored and restarted as something else.
I know when you look in the manual it looks like you'll get some kick-ass close tick battles, but you really won't. Everyone just runs away from you.
But if you do decide after all that to still go for it, then let me say: avoid rebels. They are way too weak to make even a token ranged force. If you must have some ranged support, get hippy vans. Also, don't go anywhere near protestor leaders. They are 100% useless. If you're going to play this route, it's best to accept that you can't compete at range at all, you can't compensate with rebels/LSPs/HVans, and accept that what you're good at is close only LET pwnage, and just play for that.
So something like 5:4:3 ext/fan/hvan is what I would go with, plus however many gurus my alliance needs.