it is true that the mistic does not arrive at first round, because rangers kills them in the range. it is not correct that all heroes can use the best abilities of rangers, all ranger's abilities. a warrior hero, with a mistic and 4 crossbower is virtually invincible, the same for a mistic with 4 crossbower, but a ranger is weak during the loot. i suggest to insert the abilities battle cry and leadership in the fury warriors and guardian merc. in this way all will be ok, because noone will be advantaged on others. you shoul maybe think that 2 warriors with leadership and battle cry will be the strongest hero in the game, but you should allow only to mistics and rangers to buy only one of them, or fury warrior with battle cry or guardian with leadership
let me know whta do you think about it