Vtoss would be 40 KIAS and doesnt change!
I think the answer you are looking for is the gradient in those conditions for Segment 1.
2 MIN Power OEI
My calculations say it would be ~20% ~ 11.3 degrees.
At 1.5% Segment 1 the aircraft could be at MTOW and ~ 42 C
You would achieve 200' in 1000' horizontal at 40 KIAS ~ 4000 H fpm~ 15 seconds ~ 800 V fpm.
Segment 2 MCP OEI Vy 65KIAS at those numbers would be ~ 6% or more all the way up to ~ 12-13,000'
1000' above departure at MTOW and 42 on the ground, the gradient would be ~ 2%.
NIL WIND in all of the above and data is for P2.
