2 questions,expanding the range of monster skill and about blank ability slot

[scbw1234]

1:Would it be possbile to expand the area of effect for MonsterSkill/Beastmaster

2:How many blank ability slot are there that are free to customize to a new ability without consequences?does the the one between time magic and yin yang magic free to use?and how about those slot between parasites and frog attack?In the support ability section,there are also few blank spot that are incapable of customize,is there anyway to utilize those(like the last two blank slot after move-find-item)?