Your opponent has a emerald carbuncle and amethyst carbuncle on the field, at agi 2 and 4 respectively. You have a hell smoke at agi 2 at full hp and your asuet triggers. Who do you target?
There is no way to prevent amethyst from attacking. If you target amethyst, there is the chance that emerald can win an agi roll and get a turn. If you target emerald carbuncle, there is no chance it can attack and amethyst will not get the +5 attack start.
However if you picked emerald carbuncle, you were wrong. Target amethyst because even though you might receive more damage this turn (and if you hit emerald with hell smoke, your actions have been all for naught and in the end you just received extra damage), it might put you at an advantage in subsequent turns by delaying ss trigger.
All good files have sacrificial units. It is the heart of rushes and without them, many bigs and mids would fail. All of the following listed are good candidates for files and you should consider putting in some of them into your rush file. A typical level 3 rush file will have around 4-6 level 1 sac units. However, not all sac units are the same. A few are used for open skills. You don't want to hit those if you can help it. However, do not sacrifice a chance to kill a main unit or let that sac unit tank the front row. Ways to avoid attacking them are: not targeting with soul skill, targeting another unit with a skill, making use of range, not attacking if it is the last unit alive. NOTE: IF YOU SUSPECT AN ASSASSIN, KILL THOSE ****. A few are very dangerous if allowed to stay on the field. Kill those immediately even though you are triggering your opponent's soul skills early. A small few are both. Kill those too. There are obviously times when these rules can and should be broken, but here's the general idea. Some of the dangerous ones have low agility. Sometimes it is not wise to target them with soul skill damage because you will be able to wipe them out that turn anyways. A few of these can be used for revivable units too. Those have an * next to them.
DO NOT KILL
Feline Kin Fighter
Mediator of Sun and Moon
Cemetary Rats (BECAUSE OF THE NATURE OF THE FILE)
Succubus (SAME AND ALSO... OP SP DRAIN)
Knight Apprentice (rankup)*
Folrart Flame Swordsman*
Crest Saboteur Knight
Rifleman Knight (rankup)*
Heierrat Army (rankup)*
Wounding Sword (zu)
Sun Worshiper (you have def)
Sumer (sp or offensive power)
Witch (you have level 2s)
Folrart Scout (you have important grims)
Woman of Purity (have a unit to revive?)
Miffyre (sp gen good for you?)
Exiled Military Aide