No offense but that seems like much more than they would ever do. Since 5 of those quests already give tokens (Sentinels Chain), running the saga would give over 15 tokens for 10 quests.
Yyyyyeah...thats the point
You do one run through of 3BC saga, hit a few others, and you're good to TR
Again, the point of comparison is ransacking BOB and LOD, which are both very short quests that yield 1 token each. 1.5 for the longer 3BC quests is on par
Plus, in practical reality, you'd usually use a Skip on the last awful airship quest, so its costing you 15 Shards too (or VIP sub fees)
Easiest route would be to add them in as an option for seeds.
The farming isn't terrible. Running VON a few times usually gets you there. It takes maybe 2 hours to run VON on R then E. That gives you a double batch of tokens.
Seeds would be another obvious fix, but for whatever reason they seem reticent to add in Heroic hearts for endgame quests...
Simply increasing (doubling?) Token drops in the quests where they are now would be another solution. But IDK, seems like they enjoy putting things in Saga rewards (like Cards, recently), so that seems like they might be more amenable to that.
And VoN3 is OK for the XP if you're still leveling up, but honestly those quests are not fun to run for their own sake. Arena has those long boring cutscenes, JoK is just long and beholders are irksome to a lot of builds, Prisoner has the annoying maze, and Haywire has the long annoying runbacks. VoN5 cant be soloed, and you're usually grinding tokens solo. If you're not interested in the XP (because you're about to TR) then those quests are a lot grindier.