well thats the the downside of a very strong adept trait.
basically you are on the right track. you need to work with options that will prevent losing aegis or reaply aegis fast.
PVE
If you are playing PVE then blinds are a very good option to do that too. Traiting Radiance for F1 refresh on kill is a good source or blindspam. You basically want to open with GS3 wait for the tragets miss and follow up with F1. Retreat and your F3 will refresh aegis instantly in cas you do lose it.
In pve group fights you do want to position yourself outside of the cleave and aoes.
Dodging saves aegis too and enables you to shorten CD to your blind skills.
So basically if you want to keep aegis up you need to be aware of your enemies attacks and avoid them – which is actually a very good training for any content imo.
PVP
Different but same story. The 20% damage buff is very good for ranged attacks especially if you are not the target of the enemy. Other than that it is not a reliable damage modifier since there are a lot more and faster attacks then in PVE.
This is indeed a l2p issue but if you master it you will do a lot better in any content.
that is really detailed..