I think subbing imbue for focus is a damn fine suggestion. If you already have an imbuer, you could get another 120 imbue easily enough, and then just stone it over to your burgeoning mystic t-hunter. Sure focus has some mana regen, but almost a negligible amount. The stam regen can be a helpful perk at times, but not helpful enough to necessarily spend the gold needed for a 120 focus.
Mysticism does benefit from slayers. Nether cyclone packs a mighty wallop on a good roll, but nether cyclone and hailstorm are both pretty spendy mana-wise. Of course casting to support yourr RC, rather than having to spam these to kill off spawn, offsets the mana cost concern very nicely!
A few other handy spells in that mystic book: Mass sleep is good for when sh*t gets sideways, and cleansing winds is an excellent heal/cure/remove curse. Healing stone can also be real life saver, especially if you're only using a shield for stats w/an unequip macro or are using a spellbook/shield. It'll really save the day as a quick cure while your casting an invis or a gheal, or after a gheal to top off your HP.
@SteedaFLA we were almost one fewer, lol! Mystic is sounding pretty good to me, and I've played a bard T-hunter since the last Tmap revamp. I was actually beginning to feel frustrated at the nerfiness the bard has suffered with this publish (don't get me wrong, though, the changes are great!), but you made an excellent point suggesting you use a PURE bard, peace and all.
The peace spellsongs are good, and the bard synergy is great, but I stoned off peace so long ago I've almost considered clearing the stone. That's an awesome suggestion, and I'll definitely need to give it a shot before sacking my template. If there is one thing I like better than big chests full of shiny, new loot, it's new uses for old skills. New in this case meaning using peacemaking to peace stuff, lmao... Seriously though I almost forgot the skill existed.