I like the guide, but wherever your awesome regeneration is coming from, it's not from Strengh of Spirit.
Reading this guide, you seem to think that +200 mana correspons to +6hp/5. That is wrong. Unless this has been nerfed or the tooltip is wrong, SoS generates 0.3% of your mana in health per 5 seconds.
200 mana / 1000 * 3 = 0.6 hp/5s
So lets just assume you have 2000 mana, this is what you get in health:
2000 mana / 1000 * 3 = 6 hp/5s
Ah. There we go. Buts that's nothing to fuss about really. Unless you're telling me you're starting a game with 2k in mana. For everybody else, this is just another yellow rune.