#17 - Blade has BT
#19 - Blade does not have BT
#20 - Blade does not have BT
#21 - Blade has BT - shown that Blade has been using BT for travel for independent missions
#22 - Blade has BT
#23 - Blade has BT
#24 - Blade has BT - rescues BT, who is injured in the fight
#25 - Blade does not have BT
#27 - Blade has BT
#28 - Blade has BT
#29 - Blade has BT
#30 - Blade has BT
#32 - Blade has BT
#33 - Blade does not have BT
#34 - Blade does not have BT
#35 - Blade does not have BT
#36 - Blade does not have BT
#38 - Blade does not have BT
#40 - Blade fights when Namor attacks; no BT
#42 - It is stated why Blade did not have BT in the previous issue
Given that we're talking about standard equipment, which has nothing to do with standard use, you just defeated your own point.
So for your argument, equipment that a character possesses for more than half their appearances over a 2 year period, and when they do not possess it it is narratively explained, does not count as standard equipment.
Again, I will note that Blade has been depicted with BT in the last two years more than he has been depicted using fire arms or stakes, both of which people have no problem counting as standard equipment. As noted, Blade equipment varies story to story and so standard equipment is based on what he is likely to have. Based on his appearances over the last few years, on a given mission he is likely to have BT more than any other weapon save for his two swords.