Templar focusing on ES?

I've been wondering if I could use ES on a templar with both life leech and life regen. Would something like this be viable, would it be able to keep the shield up maybe with some kiting?

http://www.pathofexile.com/passive-skill-tree/AAAAAgUBBVuLjOFz7SBG1-vuKPqVIEZxtAyTJxzcf8bBxU-_Q1Qd2ewYw22P-tvnRwZfaqp8Jy-0o4RIPI4Bb1fJNAo3Ziympus3g-q6erhs9oLkkBGKr9pilKBodDgbkc_kEZ7N0iFXDdlhah6oGPIvpzD3voTEm-yK5K9sTP88LXfjrj5nmyku2E23PsauGS4n7ayqcql82VHmtC9BP4LHQYdEckA2I020-fAfogAUTQSzAnGBb548TdhZ88AaZp760vfBcU2az0NjfLg9_FhjUFCMz7cxWPXE9vZIXz-dxIx2

I'm still new at the game, so there is no way for me to know if this could work :(