Glad your enjoying the theorycrafting SWL has to offer! Since it may be up your alley if your into that type of stuff be sure to check out https://docs.google.com/spreadsheets/d/1HVgBeFTbXH0eZ5dJVtzXXm6HyITMHLUyM8avntoPOSI/edit#gid=1352797216 for some overall usefull information but also a list of available weapons and talismans in game. Its mostly up to date.
Regarding blade specifically I have used blade main up until max IP (max gear score) and can at least provide my overall opinion. Blade has the potential to perform quite well in endgame though with a bit more skill involved due to it being melee and have a somewhat more complex mechanic (spirit blade). As mentioned spirit blade is critical to its success, at least fully optimized anywhere from 25-30% of your damage should be coming from spirit blade alone. Soviet Techsword is an amazing choice as it greatly simplifies the mechanic, due note however that the only benefit it provides is an extra active (which is not a bad thing) another important thing to note is while it converts chi to spirit blade attacks at a 1:1 ratio you can convert at a 5:6 ratio manually not a massive advantage but can be an edge. Two other popular choices purely for dps output are Blade of the Seventh Son (significant spirit blade damage boost) and Dark Precipice (for its generally useful free passives).
Aside from that build wise your only truely useful elite will be Supreme Harmony. The other two are a bit lackluster in comparison so if your at that point consider a cooldown reduction signet for your head tali.
Also when choosing a weapon for the purpose of dps you will be choosing between Havoc and Energy. I have always sided for Energy but it is tailored to my final blade setup. The reason being is that although Blade is not an energy demanding weapon starting out it becomes such in late game. Mostly due to its Elite being up every 11-13 seconds and the use of Swallow Cut instead of Tsunami. You want to avoid using basics for maximum DPS because sprit blade damage scale higher on power abilities then basics.
Theirs more I could say but don’t really want an information overload. Blade is not the highest DPS weapon but its one that several players have really enjoyed playing so you should be able to find good advice from many people.