FrogReaver
The most respectful and polite poster ever
Asis, that is why I mentioned increased fidelity.
You modelled a 0 AC foe (all attacks hit) eith -infinity saves. You can improve that model.
Gloom stalker 3 model. Hand crossbow, XBE, 16 dex. Despite ease, not invisible. HM round 1.
4d6+6 (20) at +8 to hit.
On an 18 AC foe, this is .6*4.5+.55*20+.05*14 DPR, or 14.4, 11.7 later rounds.
Snake BM is +8 for 1d6+6 then save for 3d6+2 at DC 11 (for half). We'll model 18 AC and +1 con save.
.55*(9.5+.45*(12.5)+.55*.5*(12.5))+.05*3.5=11.25
Doesn't need to use hunter's mark, but lower DPR than Gloomstalker XBE. Also gloomstalker isn't in darkness, whichher damage out of the water.
How about level 5, gloom in darkness with SS against 18 AC?
Snake BM is +9 to hit for 1d6+7(10.5) save for 3d6+3(13.5), plus a +10 to hit 1d10+1d6+4(13) HM enhanced crossbow shot. 19ish DPR.
Gloom is +4 to hit for 6d6+39(60) with advantage, or +9 to hit at 6d6+9(30) without. On AC 18 hits 5/9th of the time and crits 1/10 for 35ish DPR in darkness, 20ish in light.
Level up to 11. Snake is +10 to hit at 2d6+16(23) save for 6d6+8(29) plus +11 to hit at 1d10+1d6+5 (14). 35ish DPR.
Gloom is +6 at 6d6+45 (66) reroll 1 miss, advantage. Chance of a miss is like 70%-80% (3 attacks, each with 1/3 chance of missing, has a 70% chance of a miss). So in darkness does (22*(.7)+7*.1)3.7+4.5(.8) or about 63 DPR. Sustained, as after first round can bonus action crossbow. Switching targets does cost extra DPR.
In light, +11 to hit for 3.7*2d6+5 (44ish). Hits on a 7 for 70% accuracy. (.7*(12)+.05*(7))*3.7 is 32ish DPR. A tad less than the Snake BM.
So in light, against a low Con decent AC foe, our Snake BM has similar DPR as our gloomstalker.
DPR isn't everything, so we start looking around. Snake damage is magical, but also poison. If magic weapons are rare this could help BM.
L 11 Snake BM has a 44 HP sponge with low AC that has nearly no HD and takes more than 8 hours to replace (need to find a giant poisonoua snake, then befriend it, then spend 8 hours).
Gloomstalker has invis-in-darkness features.
Gloomstalker scales better with published treasure. Give gloom magic weapon and bolts...
BM gains less from HM, and has bonus action mostly free.
BM has more feats free; above build uses none. GS uses 2.
the simple reason beast master sucks is they their beast is too easy to kill.