Temple+ is an engine enhancement mod for Troika's Temple of Elemental Evil, including: Fixes for hardcoded bugs, Engine Modernization, UI improvements, and brand new Features!
Streamlined the Magic Armor & Armors UI, added new enhancement options (Merciful, Seeking, Speed, Thundering, Wounding, +4/+5 bonuses, and Spell Resistance 15/17/19 ugprades), and widened the Item Creation UI to fit in longer names / larger fonts such as those used by mods.
+4/+5 bonuses?
Spell Resistance 15/17/19?
This is what I was looking for for my lvl 10+ team. No clue why original devs didn't included it by default.
Probably because the original devs designed it for level 10 ;)
It wouldn't have been too difficult for them to make it more general but I guess they were on a tight deadline with no time to spare.