[X] Deploy Imperial Trust Titan Hunters- A mix of Fellswords, Northern Sentinels and Knight-Titans should be enough to take out the Bio-Titans, though not without losses.
[X] Send Reinforcements when needed- While the troops lost will hurt the time brought by the reinforcements is worth it. Current
[X] Move the Ordinatus Grábakr forward- You have a large force of your greatest warriors guarding it including an entire Eldar Titan Legion, the risk is low.
[X] Deploy Super-Elites- Between your Helguard, your Psykers, the Eldar and the Astartes you have a massive force of elites, even a tithe of them will stiffen your defences significantly. Current
[X] Use new general poison as soon as Tyranids adapt but save bio-titan poison
The Ordinatus is meant for this battle basically. It was built specifically to fight tyranids and it should be well defended against them. If it gets destroyed quickly in the battle it was designed for it wasn't useful in the first place. Which I would personally find very amusing because I thought it a waste of very valuable mechanicus time. Even if it gets destroyed it's less of a long term loss than all the forces already dying since those forces will be useful in future battles while the Ordinatus won't be.
They have titans that can teleport between regions. They can attack the Ordinatus before it's even deployed when no one is ready for it, so it could be destroyed without even being deployed. Better to actually get some use out of it.
[X] Send Reinforcements when needed- While the troops lost will hurt the time brought by the reinforcements is worth it. Current
[X] Move the Ordinatus Grábakr forward- You have a large force of your greatest warriors guarding it including an entire Eldar Titan Legion, the risk is low.
[X] Deploy Super-Elites- Between your Helguard, your Psykers, the Eldar and the Astartes you have a massive force of elites, even a tithe of them will stiffen your defences significantly. Current
[X] Use new general poison as soon as Tyranids adapt but save bio-titan poison
The Ordinatus is meant for this battle basically. It was built specifically to fight tyranids and it should be well defended against them. If it gets destroyed quickly in the battle it was designed for it wasn't useful in the first place. Which I would personally find very amusing because I thought it a waste of very valuable mechanicus time. Even if it gets destroyed it's less of a long term loss than all the forces already dying since those forces will be useful in future battles while the Ordinatus won't be.
They have titans that can teleport between regions. They can attack the Ordinatus before it's even deployed when no one is ready for it, so it could be destroyed without even being deployed. Better to actually get some use out of it.