@Cariyaga made a good point that we likely will not get a chance to use TH before our severes heal for a couple of reasons. One being that THing with chakra overdraw injuries slows your healing, and two being that Kakashi's TH skill is much worse due to Consequences, meaning he won't really be able to improve many of his existing projects...
Similarly, I think we can hold off on buying the offered stunt. We can't overdraw a severe until he heals his current severe, and while it would be useful for a moderate overdraw, that would put Kakashi near death again, plus he isn't going to be nearly as effective in a fight as it is with his existing Consequence.
That said, I'm tearing my hair out over all the different options we have so I'm just going to post a few plans, preserving most of what I've been advocating for and that appears in the current training plan:
FDB -> 40 is a good choice imo because it frequently comes up as useful offense and utility. As it turns out, burning and blowing shit up has a lot of uses. Getting extra bonus on those invokes from a better AB inside the hive would've helped us considerably in the most recent arc.
Chidori -> 52 does nothing really, but it lets Kakashi cast Lightning Dragon Bullet with the Sharingan, so that's pretty nifty. We can also use Transcendent Halo at Chidori 55, but this is a much bigger expense.
Substitution -> 20 is pretty cheap and gives another supporting 20, and +1 to dodges. There are also occasionally rolls to see if there's a valid target nearby, which Substitution is (sometimes) the skill check for.
Stone Swimming -> 1 is only .5 XP and I want to know what it does
Point of this plan is to improve a couple of crucial social skills since it sounds like Kakashi is about to attend a more diplomatic mission...
[X] Training Plan: Social Bumps
FDB 37 -> 40 (117 XP)
Chidori 50 -> 52 (103 XP)
Substitution 18 -> 20 (39 XP)
Stone Swimming -> 1 (.5 XP)
Physique 37 -> 40 (117 XP)
Deceit 29 -> 30 (30 XP)
Empathy 12 -> 20 (132 XP)
Tunnel Excavation 9 -> 10 (5 XP)
Buy "Oh no" Stunt -> (50XP)
12 XP remaining
This plan levels Chidori high enough to get access to two new techniques via the Sharingan, rather than just one.
[X] Training Plan: Stealing Thunder
FDB 37 -> 40 (117 XP)
Chidori 50 -> 55 (265 XP)
Substitution 18 -> 20 (39 XP)
Stone Swimming -> 1 (.5 XP)
Physique 37 -> 40 (117 XP)
Buy "Oh no" Stunt -> (50XP)
17 XP Remaining
This increases the duration of Shadow Clone from 30 minutes to an hour, and given how frequent we use them, that's helpful.
[X] Training Plan: More Kakashi, More Fun
FDB 37 -> 40 (117 XP)
Chidori 50 -> 52 (103 XP)
Substitution 18 -> 20 (39 XP)
Stone Swimming -> 1 (.5 XP)
Physique 37 -> 40 (117 XP)
Shadow Clone 10 -> 20 (155 XP)
MEW 7 -> 10 (13.5 XP)
Tunnel Excavation 9 -> 10 (5 XP)
Buy "Oh no" Stunt -> (50XP)
6 XP Remaining
This plan improves Radiant Bolt to 52 instead of Chidori, which makes it WAY stronger than it previously was, though it costs most of the XP.
[X] Training Plan: General Kakashi, You Are a Bolt One
FDB 37 -> 40 (117 XP)
Radiant Bolt 40 -> 52 (330.5 XP)
Substitution 18 -> 20 (39 XP)
Stone Swimming -> 1 (.5 XP)
Physique 37 -> 40 (117 XP)
1.5 XP Remaining