It needs to be the right type of gloves. When you say magic gloves, it does not imply what the type of glove it is. I was getting into knowing more about the mechanics of crafting before i got banned last time, so i don't really remember now. There is quite complicated mechanics behind it, and nobody seems to be able to explain it simply. I just get complex calculus pieces that i need to use a complex calculator function to understand, and i want it broken down into first grade understanding. I mean first grade children's school. 1+1 = 2 and so on. That's how simple i want it. But it doesn't seem anyone can... it's like Einstein said; "If you can't explain it simply, you don't know it well enough." I got quite good explaining last time i asked here, so there is a thread some months back i made, you can search that up if you want. But i suggest just keeping the line you're doing. Maybe you have researched it and know what level you need to be in order to get the affixes you want and not expend resources making levels above what you truly need. Because the art of crafting involves determining the level the glove will come out, and deducing that obviously takes some knowhow.
https://classic.battle.net/diablo2exp/items/crafted/blood.shtml
lood Gloves Magic Heavy Gloves/Sharkskin Gloves/Vampirebone Gloves
Nef Rune
Perfect Ruby
Any Jewel
Crushing Blow (5-10)%
(1-3)% Life Stolen Per Hit
+(10-20) To Life
D2:R