Hi X3non. Unfortunately, your suggestion with the "Mediatek Auto Philz Recovery Porter V1.4" did not work. See picture attachment.
Nevertheless, after a long time I have tried the "[Hovatek] Philz for Acer Liquid Z6 (T09) [Acer_AV0M0_T09_1.034.00_EMEA_GEN1] .zip" including "SuperSU-v2.82-201705271822.zip" on the new room "OS_Acer_Acer.T09. AV0M0.1.035.00.EMEA.GEN1_A60M_A.zip "can flash.
Here is my approach.
I flashing the "[Hovatek] Philz for Acer Liquid Z6 (T09) recovery.img" with "minimal_adb_fastboot_v1.4.3" on the T09. After restarting the GSM in the Philz Recovery, I re-installed the new OS.zip and the "SuperSU.zip". Thereafter, the "Philz recovery" was on the GSM via the ROM Manager boot bar. And the GSM has ROOT.