How should I augment my glave

Late but maybe will help in future runs: speed 100%. Usually augmenting weapons is unnecessary but in this case it's important. Spear and glaive have the advantage of being able to hit enemies with no damage in return thanks to their range but the slowness will cause you to skip a turn after every second attack and because of it you can't abuse the range reliably. Conveniently speed augmentation completely negates the speed downside so it takes exactly 1 turn to attack, so as long as you have a way to gain distance and no random enemies come in to interrupt you can kite enemies and continue poking them until they die forever. Some ways include the flow armor glyph, ring of haste (you had one in this run, very good) and circling around 1x1 pillars so enemies lose you (those generate in prisons which makes spear a great early game weapon)