Please change combing skin shards to not lose massive value

As the title says. I had 3 skin shards: Red Baron Corki (skin permanent shard from 3 other combinations, 910 orange essence), Gentleman Cho (just skin shard, ~600 orange essence) and Silverfang Akali (just skin shard, 325 essence). For reference this is overall 1835 or so orange essence. Combining these all together (legendary skin permanent, legendary skin shard, 975 RP skin shard) gave me Nightmare Cho'Gath and 100 orange essence. Combining 1835 orange essence and 2 legendary skin shards gave me 100 orange essence and a 520 RP skin (worth 220 orange essence) that is literally a purple recolor of Cho. It's not even chroma level, as at least chromas contain 3 different recolors and use a decent splash art.

So here's the problem. I'm fine with combining these not giving another legendary skin. I'm NOT fine with combining them giving me one of the lowest quality skins in the game for a overall essence cost above that of making a legendary skin permanent. Please, please make it so that combining enough essence for a skin tier bars some of the lower tier skins from showing up. For instance, combining over 1050 essence of shards could guarantee a 750 RP skin or higher, 1520 a 975 RP or higher, and so on. Something so that at least the skin gotten isn't complete shit compared to the amount put in.