My personal choice (which usually nets me between 40 and 50K SP) is this:
Be Sure to get a guardian as the event weapon and the 49+10 armor will be crucial for you in a bit.
Level 9--begin farming Sasquatches at 50% lockdown using REAL (not newbie) PSSP and SPB's. Do this to level 17.
Level 17--Move to Prokion and keep the 50% lockdown. Use the newbie PSSP's in here. Doesn't matter if DT or not. Keep going until level 27. Soon as you hit 21, use the event weapon.
Level 27--Treants or Elder Drakes to level 35 at 50% lockdown.
Level 35--Unlock and do quests to get as close to 50 as possible.
Level 50--Temple of Forgetfulness at 50% lockdown. Use the 49+10 armor, minerals and attack pots. Run through first spider room to straight back to the 2 legendary slayers, kill them. Run through to the other side and kill those legendary slayers. Do this a few times until you get to around 55 (you can try spiders too, if you're crazy potted you should be able to hang).
Level 60--Do Backpack quests and ToF quests, turn them in with PSSP. Stay locked down and SP farm in ToF, boosting Everything except legendary slayers and spiders.
Once you level out of ToF, you should have close to 40-50K sp (including what you used for skills).
Don't forget the SP you get at level 99 for pre-vets quest and level 100 for vet quest.
As I said, this is how I personally do it. It's worked well for 4 toons so far.
Don't forget to bloodseal your armor and weapon and use your Mercenary as often as possible. Change into the 30-32+10 set as soon as you get it. As for beginning armor and weapon, I use +4 armor and +6 weapon to the 30-32+10 stuff.
*****Of course, just because this works well for ME, it doesn't mean you will yield the same results as the difference in weapons, armor, pots, accessories, and build will make a difference..this is only a guideline of what I do.