diff --git a/comfy/ldm/lightricks/model.py b/comfy/ldm/lightricks/model.py
index 7ccb2c42a..80a3f08d7 100644
--- a/comfy/ldm/lightricks/model.py
+++ b/comfy/ldm/lightricks/model.py
@@ -1122,7 +1122,9 @@ class LTXVModel(LTXBaseModel):
                 additional_args["resolved_guide_entries"] = resolved_entries
 
             keyframe_idxs = keyframe_idxs[..., kf_grid_mask, :]
-            pixel_coords[:, :, -keyframe_idxs.shape[2]:, :] = keyframe_idxs
+
+            if keyframe_idxs.shape[2] > 0: # Guard for the case of no keyframes surviving
+                pixel_coords[:, :, -keyframe_idxs.shape[2]:, :] = keyframe_idxs
 
             # Total surviving guide tokens (all guides)
             additional_args["num_guide_tokens"] = keyframe_idxs.shape[2]
@@ -1158,12 +1160,12 @@ class LTXVModel(LTXBaseModel):
         if not resolved_entries:
             return None
 
-        # Check if any attenuation is actually needed
-        needs_attenuation = any(
-            e["strength"] < 1.0 or e.get("pixel_mask") is not None
+        # strength != 1.0 means we want to either attenuate (< 1) or amplify (> 1) guide attention.
+        needs_mask = any(
+            e["strength"] != 1.0 or e.get("pixel_mask") is not None
             for e in resolved_entries
         )
-        if not needs_attenuation:
+        if not needs_mask:
             return None
 
         # Build per-guide-token weights for all tracked guide tokens.
@@ -1218,8 +1220,8 @@ class LTXVModel(LTXBaseModel):
         # Concatenate per-token weights for all tracked guides
         tracked_weights = torch.cat(all_weights, dim=1)  # (1, total_tracked)
 
-        # Check if any weight is actually < 1.0 (otherwise no attenuation needed)
-        if (tracked_weights >= 1.0).all():
+        # Skip when every weight is exactly 1.0 (additive bias would be 0).
+        if (tracked_weights == 1.0).all():
             return None
 
         return GuideAttentionMask(total_tokens, guide_start, total_tracked, tracked_weights)
diff --git a/comfy_extras/nodes_lt.py b/comfy_extras/nodes_lt.py
index 19d8a387f..28c231daf 100644
--- a/comfy_extras/nodes_lt.py
+++ b/comfy_extras/nodes_lt.py
@@ -223,7 +223,7 @@ class LTXVAddGuide(io.ComfyNode):
                             "For videos with 9+ frames, frame_idx must be divisible by 8, otherwise it will be rounded "
                             "down to the nearest multiple of 8. Negative values are counted from the end of the video.",
                 ),
-                io.Float.Input("strength", default=1.0, min=0.0, max=1.0, step=0.01),
+                io.Float.Input("strength", default=1.0, min=0.0, max=10.0, step=0.01),
             ],
             outputs=[
                 io.Conditioning.Output(display_name="positive"),
@@ -302,7 +302,7 @@ class LTXVAddGuide(io.ComfyNode):
         else:
             mask = torch.full(
                 (noise_mask.shape[0], 1, guiding_latent.shape[2], noise_mask.shape[3], noise_mask.shape[4]),
-                1.0 - strength,
+                max(0.0, 1.0 - strength), # clamp here to amplify only via the attention mask
                 dtype=noise_mask.dtype,
                 device=noise_mask.device,
             )
@@ -322,7 +322,7 @@ class LTXVAddGuide(io.ComfyNode):
 
         mask = torch.full(
             (noise_mask.shape[0], 1, cond_length, 1, 1),
-            1.0 - strength,
+            max(0.0, 1.0 - strength), # clamp here to amplify only via the attention mask
             dtype=noise_mask.dtype,
             device=noise_mask.device,
         )