Regarding Samus' health...
Metroid Fusion has shown Samus to hold a max of 20 Energy Tanks. Each tank holds 100 Energy Units.
20 * 100 = 2,000 Energy Units
Samus acquired 4 Reserve Tanks.
4 * 100 = 400 Energy Units
Crystal Flash fully restores all Energy Tanks, excluding Reserve Tanks. If Crystal Flash can be used 5 times...
5 * 2,000 = 10,000 + 4 = 10,400 Energy Units.
Without the Crystal Flash, it's simply 2,400 Energy Units.
Let's assume Lucas used PSI Love Ω. It uses 50 PP. Let's assume it does 820 damage. So, we have 10,400 - 820. We'll use this to find out how much Energy Units Samus would have left.
First Use: 9,580
Second Use: 8,760
Third Use: 7,940
Fourth Use: 7,120
Fifth Use: 6,300
Sixth Use: 5,480
Seventh Use: 4,660
Eighth Use: 3,840
Ninth Use: 3,020
Tenth Use: 2,200
Eleventh Use: 1,380
Twelfth Use: 560
Thirteenth Use: 0
50 PP is used each time PSI Love Ω is used. 50 * 13 = 650. What is Lucas' max PP? Well, I see 390 PP. We would also have to take Lucas' healing into consideration. And if those Momentos are used, it doesn't restore PP. Oh, and the Gravity Suit cuts enemy damage to one fourth. So it's only doing a quarter of the damage it should otherwise be doing. PK Love Ω doesn't appear to be as strong anymore. If I am doing this right, 820 * 0.25 = 205. If this is correct, even this would take 12 uses of PSI Love Ω to get rid of 2,400 Energy Units. 50 * 12 = 600 PP. That's still too much. Aside from this, I don't know how Lucas will be attacking an extremely fast target. He doesn't seem to have as much PSI abilities as his teammates.