niles and tegus require completly different set ups as do frills and niles, its best not to mix anything with a nile monitor really. One day they can be friends next day the nile is eatting the other as a snack. Plus the nile is going to get big but the tegu will grow faster and may out compete the nile for food. Do both animals a favor and just have two set ups.
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Leo Gex
1.0 Giants
0.1 Red strip/hypo
1.0 Patternless
0.2 Normals
Others:
1.0 Giant plated lizard
1.0 Blue Tegu
1.1 dogs
2:0 chinchillas