Maybe change it to target 2 or 3 Ally hero with most less hp. Or simple 3 random heroes.
Just random though.. and yes i know this is not suggestion thread.
Yea, seems like i said to heal 2-3 target in a row with less % and only 1 turn invulnerability.
If you Tank a enemy, and you put invulnerability the near target will die (and it's sure it's a dps unit), that make this strategy usless on pve..
Anyway i think that it's clear to everyone that is not blind, that arch Lucille have a great passive aura, but lack on her active ability..
And i really think that VALIANTS heroes should be top priority in a matter of balancing units / reworking /buffing and nerfing.
They are the top of the top, they are what everyone should try to get at the end of the day (or of the month

)
They should shine and be the most wanted units.. Right now i don't feel like this for any of the valiant heroes.. Not because they are not strong, but only because they don't feel "Unique".
They are like other normal units, with buffed stats and buffed cap skill/aura..
And lucille Arch is even less interesting than any other perk/valiant
Look Jenoss, I get a few points from your arguments:
1) You are very passionate about VF.
2) You are VERY PASSIONATE about Lucille AB.
3) You seem to have a mindset that a Valiant MUST BE THE BEST IN THEIR CLASS, and IS CAPABLE ON EVERY TEAM. Please note that it is not exactly true, cause Valiants only have bonus stats, and skill combinations may work out in their favour, or may not. For example, a Dragoon Freya gives a 1 turn stun, which may be resisted by bosses, but Dragoon Vincent comes off as a hard tank on landing. Who is better? Really, depends on your team functions and build. If you don't use a champion class in your team build, then both Dragoon classes are USELESS.
Currently, based on the classes available and all, having a Lucille AB is worst off than having a Teresa AB ON YOUR TEAM. I get that. But this is a strategy game, but it does not mean that as long as Valiants show up on the field => sure win. Its about balance, understanding the current AI, and how to build you team to counter it. Maybe Lucille AB doesn't shine anywhere... but that may be the point to it. Nothing lacking, that makes her usable in MOST teams is the plan for her? OR, could it be that due to the heroes you currently have and can build a team around, Lucille has more limited functions than Teresa AB?
Teresa AB, while having inconsistent heals, is definitely more useful in a map with multiple weak attacks (small waves), and allies don't move about to much, aka most of your units are archers, mages and the like. Versus Lucille AB, which I gather from the skill set, is a nice single target heal, with reliable healing aura of 35% (added with slightly more magic). Lucille AB would be nice in Arena fights where you have 1 character happily targeted by enemies, like a mage or archer (My poor Winry is always the target in Arena)...In PvE, after you guardian taunts all enemies, or is a Paladin (Passive damage soaker with no bonus defence), Lucille AB might be a better choice than Teresa AB.
Do think about it, and if you feel that Lucille AB is still not as good as Teresa AB, do try and conduct a few test runs, (please take data, positioning, enemy forces into consideration, thanks) maybe we can make Lucille better.