It doesn't sound ideal, but the OTMET arrivals aren't great for the sector that works you between OTMET and TELTU. They're often trying to get you into a stream with the Gatwick traffic coming in from the South and it also crosses the Heathrow inbound track so you'll end up dropping on top of the Heathrow traffic and possibly some of the Gatwick stuff too.
If what you're asked to isn't possible then ask us which one you want us to meet. It will usually be the STAR restriction that we want you to make as there's a lot of traffic going into the TMA from all directions and you need to make the level restrictions to avoid other traffic.