No your char is not immortal during bot runs, and yes mf helps in bot runs if you intend on finding godly items, and uhh yeah your char needs to be able to kill whichever boss you make your bot run on...

I use to be a shoe shinner now I sip Aunt Jamima, I go to sleep in Europe and wake back up in China. CLUB 977 The 80's Channel!!!!! -winamp radio is heaven on earth