It wont work, since your 7.6 monsters are from very old distro and on 8.6 there is no thing like - instant spell(it's 'fire/ice/melee/physical' etc. instead), cycleticks(it's 'interval'), mindamage/maxdamage(it's 'min/max'), blood color, effect, splash, level of the monster and mlvl, and of course there is no flags which are in 8.6 and up. Basically it differs too much from newer distros, so you need to remake all monsters to make them work.