Firstly there are better ship choices for an engineer out there.
Secondly, lol2rsp.

Unless you have doffs to chain 2 subsystem etpX with only 1 copy of each, take a second copy of epts.

IMO, if you're not in a science ship, and you only have 2 sci powers, bring HE1 TSS2.

Drop at least one of those rsp's for... basically anything. ET ES EWP etc.

With only one lt cmdr tac, I would prefer something with better up-time. APD2 for example.

To fly your build with as few a modifications I would replace apo with delta 2, get doffs for eptX powers. replace rsp2 with ewp1 and replace TB with TSS. With those changes, I still wouldn't be happy because of 2 reasons.
1) Any tac escort will do what you do only better.
2) Engineers are better suited to a healer role.

I haven't played in a while, so grain of salt etc.