It's a very bloated deck. You'll have poor consistency and the're barely any good block cards in the bloat. You also don't seem to have deleted a single card. Deleting bad cards like punch is vital.
About the cards themselves: I haven't had much luck with self heal. The effect and block is simply too weak. Relying on and being able to trigger her X-Power is much more feasable. That is being able to utilize having all that corruption, while being able to remove it at the end of every turn.
Most of the cards in your deck are simply "slightly better punch". There's no direction. Lotus+ seems to have gotten some love. If you want to build your deck around that card, then you need some card draw. The Charge N' Wait's especially if upgraded supports this card greatly. I'd add another one of those in the deck. The problem for them in your deck is that they have to work against all that bloat. They'll be unable to have you draw Lotus+ consistently. Lotus+ pairs well with the heavy hit status effect, yet the're none of those in the deck.
Old trick is not a bad card, but it's mainly used to copy Powers. Powers are those cards with an orange symbol on the card, instead of the red sword (attack) or a blue star (utility). Could also be used to copy a key exhaustable attack card. Lotus is neither and a deck focused on this skill doesn't need 'em.
Something like a boil+ card wouldn't entirely go amiss too. Mostly for it's card draw, but the little bit of explosion helps too.
Here's how I would build a deck around Lotus:
It'll probably be easier to start over
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Get just a few good attack cards in the start. Like 2-3. Only 3 if you weren't able to get any really good attack card. Focus on deleting punches and raising relationship level moreso than anything. Add utility fusions to the DEF cards, if you haven't, found any good utility cards. Find 1 or 2 decent attacks in the starting shop. Lia has a common triple attack card, which is really good. It's more than good enough for the endgame. Get some explosion or strength from utility cards to really rock that card. Don't overdo it with those either, just a 1 or 2 in the start. Elites elites elites. They are probably the most important to attack. Raises relationship level, get's you money, and a card. Although many times it's better to not take any cards, if they are bad or don't do enough.