Great intention. In Jain Dharma, there are several revered stotras and mantras that help purify the mind and reduce delays caused by antray karmas. Since you already chant Bhaktamar Stotra, Nani Shanti, and Navkar Mantra, you can add a few more well-established recitations. I’ve kept the explanations simple and aligned with Jain tradition, noting where Digambar/Shwetambar perspectives differ.

Additional mantras/stotras you can consider

1) Padmavati Stotra (Padmavati Stavan)

• What it is: A devotional hymn to Padmavati Devi, revered in many Jain traditions as the goddess of wisdom and protection.
• Why it helps: Deepens reverence, steadies the mind, and nurtures humility and restraint, which support removing inner impurities associated with antray karmas.
• Simple meaning: Praises Padmavati’s virtues, invokes protection, and strengthens the resolve to live righteously.

2) Parshwanath Stuti (Parshvanath Stavan)

• What it is: A respectful eulogy to Lord Parshwanath, the 23rd Tirthankara.
• Why it helps: Encourages courage, steadiness, and non-violence in thought and action; helps align the mind away from deceit, attachment, and other karmas that cloud right knowledge.
• Simple meaning: Declares the glory of Parshwanath and seeks his blessings for purity of conduct and thought.

3) Shantinath Stavan (Shantinath Stuti)

• What it is: Hymn venerating Shantinath, the Tirthankara of peace.
• Why it helps: Cultivates inner peace and non-attachment, reducing agitation and restlessness that feed antray karmas.
• Simple meaning: Praises the calm virtue of Shantinath and requests protection from inner disturbances.

4) Mahavir Stavan / Mahavir Charitra (short bhakti stotra)

• What it is: A concise hymn venerating Lord Mahavir and his teachings.
• Why it helps: Centralizes the path of right faith, right knowledge, and right conduct; helps remind the chanter of the aim to overcome delusion.
• Simple meaning: Honors Mahavir’s life and teachings, seeking to follow his path with humility.

5) Namo Siddhanam (Siddha Namaskar) variation

• What it is: A short reverential salutation to the liberated beings (Siddhas), sometimes recited after Navkar.
• Why it helps: Fosters inner resolve to walk the liberated path and strengthens detachment from karmic attachments.
• Simple meaning: Salutes the perfected souls who have shed all karmas.

6) Shwetambar/Digambar note

• Some stotras are preferred or emphasized differently by Digambar and Shwetambar communities. If you plan a fixed schedule, you may want to select versions that your community or guru recommends and learn the appropriate pronunciation and cadence for your lineage.

Tips for incorporating these into your practice

• Start with one new stotra at a time. Allocate a stable, quiet time (e.g., 15–20 minutes) to recite with focus.
• Maintain a consistent mood: humility, gratitude, and non-violence in intention as you chant.
• If possible, learn the exact verses from a reliable Jain teacher or text in your tradition to preserve the original meaning and meter.
• Pair each recitation with a brief reflection on the virtue you are cultivating (e.g., peace with Shantinath Stavan, courage with Parshwanath Stuti).

About meanings and tradition

• Different Jain sects may have slightly different preferred verses or order of recitation. The core aim is the same: purify the mind and reduce karmic as well as mental obstacles to right knowledge.
• If you’d like, I can help you map these stotras to your daily routine (morning/evening) and suggest a balanced week plan that includes the ones you already chant.

Would you like me to provide you with exact, traditional verses for any of the above (in Devanagari with a transliteration and brief arth), or help you design a 3–4 week recital plan that evenly distributes these along with your existing chants?