Ok my idea for heavy strike is to make it some kind of SneakAttackish style of spell like it was with SAcannonball but w/o needs of subbing /thf.
We seriously have a ton of spells that works on weak/middle defensive mobs. We lack a spell that will work for high def monsters.
So far only way to damage "HNMs" is to sub /thf and force crit on one our strong 1hit spells (Benthic Typhoon, Vanity Dive for example). SE can fix that in two ways. One which is very hard to balance would be based on letting us boost our blue magic attack with spell or equip. Like I wrote it would be hard to balance because it would boost all our spells. second way is to give us spells that are 100% crit or have blue attack bonus attached to it like some weaponskills (Tachi: Gekko for example). Heavy Strike was a very good step in that direction but SE completely destroyed the idea with bad reasoning. They found it overpowered because of abyssea buffs and ability to spam it (low cost low recast). They solve this in a worst possible way because it is still spell that you can spam but only on trash mobs making it just another physical spell to chain with QC,Goblin,Diss etc. Instead of that they should add accuracy bonus to it and let us use it as one reliable source of damage against hard defense monsters and limiting us by middle high recast.
Basically instead of reducing it overtime power they reduced the pull of mobs on which it can be used and that is a fail in my opinion and that should be fix if possible. Camate please throw that idea higher maybe someone from development team will catch it.
EDIT: I know my english is hard to read, sorry