Crawler exist which even with non trunk route, keep on adding delays (MLDT-ANVT/Sealdah-DLI, Neelanchal, Poorabiya, Sadbhawna etc), which m quite sure u gonna avoid at any particular day to travel!! Safe traveler can anyday book berth in empty non-trunk route trains as mentioned & still would feel astonished!!
U didnt mentioned varanasi but keep repeating Phaphamau, to reason better known to urself while i could judge that via Phaphamau is neither approachable via ALD wthout LR nor BSB via zig-zag trail!!