Ohh Andrev_PL Andrev_PL Andrev_PL are you an orc player ?? ;o
Kodo/walker vs ne is good but where is your front line (grunts ?)?! your kodos get easily raped and dryads rape ur walkers(dont forget that dryads are immune)..... so grunt(begin)/raider/kodo/cata is the best...imo. Try to watch some topplayers replays and you'll see that most of them dont use walkers vs bears/dryads..
Grunt/raider/kodo/cata with link is gg on an orc mirror in many maps, like LT/MS, etc. Another thing, when u train FS, in a mirror, what you wanna do is make manymanymany summons, so why should you go fs+sh ?! sh is good but fl is good as well. What makes the difference ? Maps+skill.
Then I would go fast tech as well with fs+fl + grunt/raider/many catas with peons/walker.I always play. Fast tech>harushing with FS. Next i train 2 grunts>Shadow Hunter( saperd ward+healding wave)+mass HH and SW.