Looks like your first 1 you got max damage, which is level 10 damage boon but that pesky durability defect popped in there.
Looks like your second SS, your damage boon only got up to about 4 or 5 (can’t remember exact numbers) and that pesky durability defect got you more on that one
But looks like you got level 7 speed boon on first 1 and level 8 on second which is IMO fast enough without a speed brew
FYI- you only honestly need level 8 damage boon for 1 hit on tier 6 planet and it would also 1 hit a tier 7 (Lucent Exo) with a mega strength brew (granted you have max mining stats)
So maybe stop while your ahead on the damage if your at level 8 damage boon and level 7 or 8 speed boon, (speed doesn’t change that drastically if you go any higher) then you won’t get such high defect durability (unless your trying to max forge for max stats, then it gets really tricky)
Have you tried using fate paste 2? Protection paste 2?
Pretty darn good for your first couple forges