Without a spinal, a ship is not a threat. That is an effective mission kill. With the M drive out, that means the ship might as well be dead as well. Not sure how it could keep up in the fight anyways.
With its MDrive gone, not sure how you can withdraw it either
Irrelevant. I was going by the actual statistics of things happening. Besides, if memory serves, the statistical combat resolution is only used for large number of die rolls (And by large, that means >35). 10 rolls is not in that range as far as I'm concerned.
Actually it cuts in at ten identical rolls.
HOWEVER, just to look at this "properly", please have a look at the following...
1 x Jmes Class Battleriders
Ship: Jmes
Class: Jmes
Type: Battlerider
Architect: Andrew Vallance
USP
BR-H106NJ2-E99909-999J9-0 MCr 10,356.150 8.2 KTons
Bat Bear 2 1 11111 Crew: 96
Bat 2 1 11111 TL: 15
Cargo: 3.500 Frozen Watch Fuel: 1,804.000 EP: 1,804.000 Agility: 6 Shipboard Security Detail: 8
Fuel Treatment: Fuel Scoops
Backups: 1 x Model/9fib Computer 1 x Bridge
Architects Fee: MCr 103.562 Cost in Quantity: MCr 8,284.920
1 x Jmesship Class Battleships
Ship: Jmesship
Class: Jmesship
Type: Battleship
Architect: Andrew Vallance
USP
BB-R1469J3-B99909-999J9-0 MCr 86,938.112 100 KTons
Bat Bear Y 4 11117 Crew: 808
Bat Z 6 1111A TL: 15
Cargo: 139.000 Frozen Watch Fuel: 49,000.000 EP: 9,000.000 Agility: 6 Shipboard Security Detail: 100
Craft: 4 x 30T Boat
Fuel Treatment: Fuel Scoops and On Board Fuel Purification
Backups: 1 x Model/9fib Computer
Substitutions: Y = 56 Z = 80
Architects Fee: MCr 869.381 Cost in Quantity: MCr 69,550.490
1 x Jmesten Class Fleet Tenders
Ship: Jmesten
Class: Jmesten
Type: Fleet Tender
Architect: Andrew Vallance
USP
AF-L7414J3-099900-99003-0 MCr 9,011.890 20.8 KTons
Bat Bear H 11 7 Crew: 148
Bat J 11 8 TL: 15
Cargo: 14.000 Fuel: 9,152.000 EP: 832.000 Agility: 1 Shipboard Security Detail: 21
Craft: 1 x 8200T Rider, 4 x 30T Boat
Architects Fee: MCr 90.119 Cost in Quantity: MCr 7,209.512
1 x Tmes Class Battleriders
Ship: Tmes
Class: Tmes
Type: Battlerider
Architect: Andrew Vallance
USP
BR-L106FJ3-B99909-999T9-0 MCr 21,840.812 24 KTons
Bat Bear 7 2 11112 Crew: 277
Bat 8 3 11113 TL: 15
Cargo: 263.500 Frozen Watch Fuel: 3,600.000 EP: 3,600.000 Agility: 6 Shipboard Security Detail: 24
Craft: 4 x 30T Boat
Fuel Treatment: Fuel Scoops and On Board Fuel Purification
Backups: 1 x Model/9fib Computer 1 x Bridge
Architects Fee: MCr 218.408 Cost in Quantity: MCr 17,472.650
1 x Tmesship Class Battleships
Ship: Tmesship
Class: Tmesship
Type: Battleship
Architect: Andrew Vallance
USP
BB-T1469J4-B99909-999T9-0 MCr 341,845.822 396 KTons
Bat Bear X 6 1111Q Crew: 3146
Bat Z A 1111Y TL: 15
Cargo: 2.500 Frozen Watch Fuel: 194,040.000 EP: 35,640.000 Agility: 6 Shipboard Security Detail: 396
Craft: 4 x 30T Boat
Fuel Treatment: Fuel Scoops and On Board Fuel Purification
Backups: 1 x Model/9fib Computer
Substitutions: X = 201 Y = 40 Z = 336
Architects Fee: MCr 3,418.458 Cost in Quantity: MCr 273,476.658
1 x Tmesten Class Fleet Tenders
Ship: Tmesten
Class: Tmesten
Type: Fleet Tender
Architect: Andrew Vallance
USP
AF-P7414J3-099900-99003-0 MCr 25,099.240 59.6 KTons
Bat Bear Y 11 4 Crew: 363
Bat Z 11 6 TL: 15
Cargo: 80.000 Fuel: 26,224.000 EP: 2,384.000 Agility: 1 Shipboard Security Detail: 60
Craft: 1 x 24000T Rider, 4 x 30T Boat
Substitutions: Y = 45 Z = 57
Architects Fee: MCr 250.992 Cost in Quantity: MCr 20,079.392
1 x Tpa Class Battleriders
Ship: Tpa
Class: Tpa
Type: Battlerider
Architect: Andrew Vallance
USP
BR-K106KJ3-B99909-99T99-0 MCr 16,160.062 15 KTons
Bat Bear 4 2 11122 Crew: 180
Bat 4 2 11122 TL: 15
Cargo: 97.000 Frozen Watch Fuel: 2,850.000 EP: 2,850.000 Agility: 6 Shipboard Security Detail: 15
Craft: 4 x 30T Ships Boat
Fuel Treatment: Fuel Scoops
Backups: 1 x Model/9fib Computer 1 x Bridge
Architects Fee: MCr 161.601 Cost in Quantity: MCr 12,928.050
1 x Tpaship Class Battleships
Ship: Tpaship
Class: Tpaship
Type: Battleship
Architect: Andrew Vallance
USP
BB-S1469J4-B99909-99T99-0 MCr 192,440.832 222 KTons
Bat Bear X 6 1111K Crew: 1778
Bat Z A 1111Y TL: 15
Cargo: 19.500 Frozen Watch Fuel: 108,780.000 EP: 19,980.000 Agility: 6 Shipboard Security Detail: 222
Craft: 4 x 30T Boat
Fuel Treatment: Fuel Scoops and On Board Fuel Purification
Backups: 1 x Model/9fib Computer
Substitutions: X = 114 Y = 30 Z = 176
Architects Fee: MCr 1,924.408 Cost in Quantity: MCr 153,952.666
1 x Tpaten Class Fleet Tenders
Ship: Tpaten
Class: Tpaten
Type: Fleet Tender
Architect: Andrew Vallance
USP
AF-M7414J3-099900-99003-0 MCr 15,889.240 37.4 KTons
Bat Bear Y 11 3 Crew: 237
Bat Z 11 4 TL: 15
Cargo: 8.000 Fuel: 16,456.000 EP: 1,496.000 Agility: 1 Shipboard Security Detail: 37
Craft: 1 x 15000T Rider, 4 x 30T Boat
Substitutions: Y = 31 Z = 35
Architects Fee: MCr 158.892 Cost in Quantity: MCr 12,711.392
1 x FYB Class Boats
Ship: FYB
Class: FYB
Type: Boat
Architect: Andrew Vallance
USP
YB-0602211-030000-00002-0 MCr 9.950 30 Tons
Bat Bear 1 1 1 Crew: 2
Bat 1 1 1 TL: 15
Cargo: 11.500 Passengers: 14 Fuel: 1.000 EP: 0.600 Agility: 2
Fuel Treatment: Fuel Scoops
Architects Fee: MCr 0.100 Cost in Quantity: MCr 7.960
It would appear that you can get the following
7.3 T meson riders for 1 T meson ship
9.9 J meson riders for 1 T PA ship
3.9 J meson ships for 1 T meson ship
1.7 J meson riders for 1 T PA rider
2.4 J meson riders for 1 T meson rider
2.2 J meson ships for 1 T PA ship
EDIT I forgot
17.6 J meson riders for 1 T meson ship
Clearly at 10 to 1 a force of T PA ships is going to be cut to pieces by a force of J meson riders. However the T PA rider is an attractive option.