damn i cannot see morpheas post. damn even a forum software they are not capable of doing right... slow and buggy. 
edit: the posting helped
morph, i didn't ment to take both at the same time. you can go either way, although taking ankhlet is the better and safer way.
spit won't help you. if the reg gos on furry + maim + mines, taking favoring hp equip (armor is useless) he will easaly outdmg your spit. of course this starts to work after level 4. before that the regulus won't have the equip and skills needed.
you can chase the reg so far you want, you want get him fast enough if he does it right. just turning back as soon as you try to catch him, imediatly attack again as soon as you turn back... quite boring i find, but it works.
later on, together with mines you are screwed faster than you can say "gotcha" if he keeps up this tactic
edit: just as a side note: of course if you build your ub purly to destroy reg you can do that. you need to take the ankhlat as favor, boots from the start on, and early some mana items. but who will do that as it sucks for the rest? only in a one on one yuo would chose that knowing what the regulus plans.