@FrankCachia I’m no Crusader expert but general advice, I don’t think the problem is your weapon. Weapons do get better, but even the best weapon can’t multiply your damage by thousands, which is what you need for significantly higher GR. Looking at your build, what you’re missing is perhaps not obvious but once you hit level 70 items, the game’s main massive damage multipliers are through specific other gear, not weapons. There are three major kinds of damage multipliers you want:
The first is the Legacy of Dreams (LoD) legendary gem, which is a percent damage multiplier per legendary or set item you have equipped, no matter whether a low level or endgame item, no matter what it is, so long as you have no set bonuses. If you have even one set bonus, the gem will do nothing, so watch out for that. (The Legacy of Nightmares (LoN) set works too but skip it since it requires all Ancient items.) The LoD bonus starts low but gem levels add up quickly. With random legendaries in every slot, roughly every two gem levels will double your damage.
LoD is what you should be running at GR26, on any build, and at higher levels, at least until you have a full class set, and probably until you have a full class set and a decent set of items that match it. So forget sets, run pretty much any legendary or individual set items (which count as legendary to the gem) with this. Just avoid getting a set bonus, as it’s a gem condition that you don’t. LoD with random legendaries can carry you to much higher GRs easily, so long as you keep trying to level the gem whenever you can.
Next are class-specific legendaries which boost specific skills for your class. These are random drops so you’ll find one eventually even at low GR. When using Legacy of Dreams I’d ignore builds completely, if you find a damage boosting item like Darklight (800%-1000% x2 more damage through Fist of the Heavens), I’d use the first one you find and switch to that skill. If you’re lucky you can stack a few of these (which is how the wizard’s Legacy of Dreams Twister build works, several items all boost Energy Twisters, and LoD boosts everything). It doesn’t matter if your build isn’t “official”, it’ll carry you a long way into higher GR.
Finally there are the class sets, where the six piece bonus is a many thousands of percent damage multiplier. Once you’ve a full set and a few particular-skill boosting items which go well with it, you can switch out from Legacy of Dreams to this. Pieces will drop, and Kadala can fill in the blanks if she’s in a good mood. Some sets are much better than others, unfortunately. maxroll.gg can help tell the most effective sets from the least.
maxroll.gg and similar sites have particularly optimized builds for GRs 90 (“speed”) up to 150 (“pushing”), but they don’t really cover the earlier game, and they presume high paragon and a lot of experience with the game. If you happen to be able to assemble something approximating one of their builds sooner, great, but it’s not required to make significant progress from where you are now. Hope that helps.