Contrary to the other answer, I suggest Lum Berry with Petal Dance. As you said that Life Orb requires 24 BP and you only have 1 BP, personally in this case Lum Berry is much easier to obtain compared to Life Orb.
Given after defeating Pokémon Rangers in Route 1, Pinwheel Forest, Moor of Icirrus, and Clay Tunnel.
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You don't need more than one Lum Berry. After consuming them once in battle, you would get them back after the match finishes. Lum Berry + Petal Dance / Outrage is a pretty neat combo, it avoids you getting hurt by confusion. It's also nice as it also avoids any form of status.
If you manage to get Life Orb, then it wouldn't be really a good combo, as only one attacking move + Life Orb is really weird. I would prefer a Hidden Power move over it, assuming you manage to get HP Fire or Rock (you can check them) or for what it's worth, Giga Drain over Petal Dance with Life Orb.
Lilligant @ Life Orb / Lum Berry
Ability: Chlorophyll
EVs: 4 HP / 252 SpA / 252 Spe
Timid Nature
- Quiver Dance
- Sleep Powder
- Giga Drain / Petal Dance
- Hidden Power Rock / Leech Seed
This is what Smogon recommends. Leech Seed and Petal Dance along with Lum Berry, or preferably Giga Drain + another attack with Life Orb.
Hope this helps!