Map Suggestions

i have nearly finished my map Gnolls V Trolls this is what all i have to do now

1.give 8 heros skills names and balance them
2.think up a few magic items fo he magic shop in the game

i would like your help with this and i will give u a idea of what i need in the heros

all herops have ultimate and 3 skills that go up to level so 10 is max level in this.

troll hero 1 - shadow hunter model (strength hero)
troll hero 2 - troll priest (intelligence hero)
troll hero 3 - headhunter (agilty hero)
troll hero 4 - troll warlord (overll hero)

gnoll hero 1 - furblog tracker (strength hero)
gnoll hero 2 - elder sasquacth (intelligence hero)
gnoll hero 3 - satyr hellcaller (agilty hero)
gnoll hero 4 - beserk wildkin (overall hero)

now i want the troll heros to be more faster in general then the gnoll heros which will be more stronger so if the shadow hunter and furblog tracer went 1 on 1 the furblog would win but the shadow hunterm attackts quicker and moves quicker but the gnoll hero has more damage and health the hardest thing in this would be balance.