i just noticed... since 7.2 these rubies in 2nd grid (just up) have changed
http://eu.allodswiki.ru/calcnew/#!4!133.…!kbtujohe/B!a/B
at 1st i thought its silly as there is less blood now and no autoblood except lurker
but then i realized this makes the main attack FREE!
so you can pull whatever you want and never run out of blood
just writing this here for those who were not aware, its awesome
(before, these rubies were supportaspect, and this was available very late in leveling, this really was silly, now is after a few levels reachable!!)