Advanced scenario plasmas must often be run at low densities and high power, leading to hot edge temperatures and consequent power handling issues at plasma-surface interaction zones. Experiments at JET are addressing this issue by exploring the use of extrinsic impurity seeding and D2 puffing to reduce heat fluxes. The experiments presented in this paper continue the line of Advanced Tokamak scenario studies at high triangularity in JET by concentrating on the characterisation of the edge pedestal and the ELM behaviour with Deuterium and/or light impurity fuelling (Neon, Nitrogen). Advanced scenario plasmas must often be run at low densities and high power, leading to hot edge temperatures and consequent power handling issues at plasma-surface interaction zones. In the experiments considered in this paper itBoth has been found that both injection of extrinsic impurities and D2 puffing are shown tocan have a significant impact on the edge pedestal in typical JET conditions relevant to Aadvanced Ttokamak conditionsscenarios. The ELM energy loss, ∆WELM/Wdia, can be reduced to below 3% and the maximum ELM penetration depth can be limited to r/a  > 0.7, thus enhancing the possibility for sustainable internal transport barriers at large plasma radius. These conditions can be achieved in two separate domains, either at a radiated power fraction (Frad) of 30% or at a fraction of > 50%. At the lower Frad the ELMs are type I and a high pedestal pressure is maintained, but the occasional large ELM may still occur. At Frad > 50% the pedestal pressure is degraded by 30%–50%, but the ELMs are degraded to type III fully mitigated. The intermediate regime at Frad ~ 40% is unattractive for ITB scenarios because large type I ELMs occur intermittently during the predominantly type III ELM phases ( compound type I/III ). Only D2 fuelling is required to achieve Frad = 30%, can be obtained with D2 fuelling alone, whereas whereas neon or nitrogen seeding is needed to achieve Frad > 50%. Only aA limited number of tests have been carried outperformed with nitrogen seeding, with the preliminary conclusion that the plasma edge behaviour is similar to that with neon seeding oncewhen the radiated fraction is matched.