Great...after dealing with the first engine fire and using the 1st bottle. Gratuitous use of the second one if you feel so inclined won't be that bad.
SAVING it for the other engine is a waste of time....any problem in that one will see you earth bound just after the T handle is pulled and before your PNF gets a chance to fire the bottle
This will be the reason that Crab and certain other overwater low level operators like the idea of remaining low to deal with the emergency and then when satisfied all's well climbing if needed.
Get your TRE to give you a fire on the next SIM LPC/OPC after the TDP call offshore, tell him you want number 2 to give you a fire just after you fired bottle 1
