Sorry for the delay on this update as it was requested some time ago and brought to light recently.
You are now able to completely change the Tier lore.
Code (Text):
# Now include a Display-Name: (can be anything)
# and specify a slot in which the item should be displayed.
Display-Name: '&4Tier 1'
Display-Slot: 10
Lore:
- '&9==========='
- '&3Ranks: %ranks%'
- '&9===========
To show the rank amounts use %ranks%, it supports all other placeholderapi related placeholders would you need it.