Asceticism is cool but you might just benefit more from using a card like Vines of Vastwood to protect your creatures, can also double as a buff. Also depending on the money you are willing to spend you might be better off using Sacred Foundry Stomping Ground and/or Temple Garden instead of Jungle Shrine .. Finally I would recommend Hellrider and if your making a side board Loxodon Smiter

I play multiplayer, so Vines of Vastwood , beyond being very good, is insufficient.

land problem is solvable with time. beyond the proportion of land, these may be changed. also if I have several shocklands, I can change the Llanowar Elves for Arbor Elf .

the Hellrider is not a bad idea, just would not know which replace it.

Umm, I think I would take out 1 lanowar elf (mainly because you have so many other mana producers) and 1 Lightning Bolt its solid but you benefit more from the Hellrider . also Triumph of Ferocity might be better than Staff of Nin depending on what your friends play.