I want to make a dexterity based support character that uses weapons mainly for self-defence and not for offence. She will be multi-classed as a Monk/Cleric and themed as a Japanese shrine maiden.
For that, I want her to use a polearm with Reach so that she can keep enemies at a distance with the Polearm Master and Sentinel feats. But being a dexterous character with very little strength it would be useless if she has to do strength based attack rolls.
For this to work, I need a polearm with the Reach property that fulfils either of these conditions:
Simple weapon which lacks the Heavy and Two-handed properties. (Monk weapon)
Simple/Martial weapon which lacks the Heavy and Special properties. (Kensei weapon)
I wouldn't mind taking Way of the Kensei as her monk tradition to achieve the result I want, but a Simple weapon would be preferable since Way of Tranquillity fits the character much better.
So, I came up with an idea for a homebrew weapon that would allow me to play out the above character idea, but I want to make sure it is balanced.
The weapon is basically a longer quarterstaff with Reach, and Two-handed instead of Versatile. It may as well be Martial since the Two-handed property disqualifies it from being a monk weapon.
Is this weapon with these properties balanced?
If so, would 1d6 damage (two-handed) be an appropriate damage for it?
Alternative suggestions are welcome.